SCRUB. For the third day running, stormy weather in Central Florida will postpone the Delta 4 rocket. Liftoff will be rescheduled for Monday at 6:43 p.m. EDT.

The forecast for Monday calls for drier air moving into the area, scattered clouds, but thunderstorms in the area. There is a 60 percent chance of acceptable weather.

There is an hour left for the weather to clear for this launch opportunity tonight.

The flight thru precip. rule has cleared, but the anvil clouds rule has gone RED.

The hold has formally been extended.

T-minus 4 minutes and holding. The countdown has entered a hold to wait for the weather to improve.

The weather officer says the rules should start to clear by around 7:30 p.m. EDT.

A check of the weather now shows RED for the following rules: lightning, electrical potential, cumulus clouds and flight thru precip.

Now 60 minutes till launch window opens! The Delta 4 rocket launching GSSAP and ANGELS is known as the Medium+ (4,2) model. It has a common first stage with two solid rocket boosters, a cryogenic second stage and a 4-meter-diameter payload shroud.

The first stage is fueled by supercold liquid hydrogen and liquid oxygen. The RS-68 main engine, made by Aerojet Rocketdyne, generates about 663,000 pounds of thrust. Known as the Common Booster Core, or CBC, the stage measures about 150 feet in length, 16 feet in diameter and weighs 54,000 pounds unfueled.

The strap-on solids are known as Graphite Epoxy Motors, or GEM 60s, built by ATK. They are five feet in diameter, 53 feet long and generate 280,000 pounds of thrust each.

The second stage features a restartable Aerojet Rocketdyne RL10B-2 engine burning liquid hydrogen and liquid oxygen. The total thrust is 24,750 pounds.

Protecting the payload during atmospheric ascent is the payload fairing measuring 39 feet in length and 13 feet in diameter. It is a composite nose cone built in two halves.

The Delta 4 stands 205 feet tall, weighs 721,000 pounds at launch and generates about 1.2 million pounds of thrust at liftoff.

A 50-knot wind warning will be going into effect for the Cape.

Reports of a tornado in Titusville.

The vehicle is fully fueled! Loading of the upper stage liquid hydrogen and liquid oxygen tank has been accomplished.

The Phase 2 is back in effect.

The weather officer is projecting a clear of the violated rules by 7:30 p.m.

Tanking of the first stage with hydrogen and oxygen is complete.

The Phase 2 has ended.

The "go" has been given for the upper stage liquid oxygen chilldown in advance of filling that tank.

The launch team is preparing to start fueling the Delta 4 rocket's upper stage. The "go" has been given to start the chilldown conditioning of the upper stage liquid hydrogen system.

A Phase 2 lightning warning has been issued for the Cape.

A Phase 1 lightning watch has been issued for the Cape.

A check of the weather shows currently NO GO for cumulus clouds and flight thru precip.

And now the chilldown of Delta's first stage liquid oxygen system is starting. This preps the tank and pumping to guard against shock when the supercold oxidizer begins flowing into the rocket a short time from now.

A "go" has been given to start the cold gas chilldown conditioning of the first stage liquid hydrogen system. This is the precursor to filling the vehicle with propellant.

T-minus 4 hours, 15 minutes and counting! For the fourth time, the countdown is underway! The team has been polled and is ready for cryogenic fueling as the countdown is underway for today's opportunity to launch the Delta 4 rocket with the GSSAP satellites.

T-minus 4 hours, 15 minutes and holding. The countdown has entered a 15-minute built-in hold, a pre-planned pause designed to give the team time to catch up on any work that could be running behind schedule.

A check of the current weather shows all of the rules are GO at the present time. The forecast for launch time still predicts thunderstorms in the vicinity and a 30 percent chance of acceptable weather. A similar pattern to last night.

SCRUB. Tonight's launch attempt has been called off due to thunder and lightning at Cape Canaveral. The team will set up for another try tomorrow at 6:51 p.m. EDT, with slightly better weather odds expected.

This hold, obviously, has been extended beyond the planned 15 minutes because of weather.

T-minus 4 minutes and holding.

A check of the weather now shows RED for the following rules: lightning, electrical potential, cumulus clouds, anvil clouds and flight thru precip.

Engineers report there was no adverse impact from the lightning strike on the launch vehicle.

Now 45 minutes from launch time. Weather remains RED.

A lightning strike within 0.28 miles.

A Phase 2 lightning warning has been issued for the complex.

Now the electrical potential in the air is violating the launch rule.

The vehicle is fully fueled! Loading of the upper stage liquid oxygen tank has been accomplished.

Weather has gone RED due to cumulus clouds.

First stage LOX and upper stage hydrogen loading complete.

A Phase 1 lightning watch has been issued for the Cape. And so it begins.

The Delta 4 rocket's Common Booster Core first stage and upper stage are being loaded.

Complex 37 has two giant sphere-shaped fuel tanks to store the cryogenic liquid oxygen and liquid hydrogen. The LOX tank holds 250,000 gallons and LH2 sphere about 850,000 gallons.

The cryogenics are fed from the storage tanks through pipelines to the pad. For the Common Booster Core, the propellants are routed up to the launch table upon which the rocket sits. Tail service masts, the large box-like structures at the base of the vehicle, feed the oxygen and hydrogen to the booster via separate umbilicals.

The upper stage receives its cryos from the middle swing arm that extends from the Fixed Umbilical Tower to the front-side of the rocket.

The launch team is actively loading the upper stage with liquid hydrogen and oxygen.

First stage liquid oxygen chilldown is complete, moving into fill.

Now into chill for the upper stage liquid hydrogen.

Liquid hydrogen flow to the first stage is confirmed. Some 110,000 gallons of LH2 will fill the rocket's tank.

The cold gas chilldown conditioning of the liquid hydrogen system has been accomplished. Liquid hydrogen propellant will begin to flow into the first stage in "slow-fill" mode. That is sped up to "fast-fill" after a small portion of the tank is loaded.

Chilled to Minus-423 degrees Fahrenheit, the liquid hydrogen will be consumed by the RS-68 main engine along with liquid oxygen during the first four minutes of the launch.

Chilldown has started for the first stage liquid hydrogen system. Fueling operations are underway for the third attempt to launch Delta 368.

T-minus 4 hours, 15 minutes and counting! Try No. 3! The team has been polled and is ready for cryogenic fueling as the countdown is underway for today's opportunity to launch the Delta 4 rocket with the GSSAP satellites.

The launch team is manning stations for the start of fueling operations.

T-minus 4 hours, 15 minutes and holding. The countdown has entered a 15-minute built-in hold, a pre-planned pause designed to give the team time to catch up on any work that could be running behind schedule.

SCRUB. Stormy summertime Florida weather will prohibit the Delta 4 rocket from launching tonight. The launch team has been directed to set up for another try tomorrow at 6:55 p.m. EDT.

The flight thru rain rule has been broken.

The weather forecast for tomorrow's launch opportunity is much the same. There is some improvement on Saturday.

ULA says 30 minutes remain in tonight's launch window.

A Phase 2 lightning warning for the launch complex has been called.

A check of the weather now shows RED for the following rules: disturbed weather, lightning, electrical potential and cumulus clouds.

The countdown remains holding at T-minus 4 minutes.

The weather rule governing electrical potential in the air is violated now, too.

The weather officer believes these conditions could clear by 9 p.m.

Cumulus clouds and lightning are the two issues at the moment.

The team has been directed to stand by in a ready posture pending the weather.

The launch team has been been polled. No technical constraints were voiced, but the weather remains NO GO due to storms approaching.

NO GO on weather.

Standing by for the launch team readiness check for continuing the countdown.

Now 12 minutes to launch! The launch team will be polled in the next few minutes to confirm all systems are "go" to press onward for 6:59 p.m. liftoff.

Launch minus 15 minutes!

The ULA launch team and management are guiding the countdown from the Delta Operations Center, located about 9,200 feet from the pad. The engineers overseeing the rocket and ground systems are located on the third floor and the Mission Directors Center room is on the fourth floor. Both rooms have a view of pad 37B and the Delta 4 rocket out their windows. Other rooms are also set up for engineering support.

The DOC was formerly built to support the Titan-Centaur program but was refurbished to support Delta 4.

T-minus 4 minutes and holding. The countdown has entered the planned 15-minute hold leading toward the 6:59 p.m. EDT liftoff of the Delta 4 rocket.

This pause is designed to give the launch team the opportunity to catch up on any work running behind schedule and verify all is in readiness for the final moments of the count. A series of management polls will be conducted during the hold to give approval to proceed with the launch.

The countdown is entering the final 30 minutes until the Delta 4 rocket launch from Cape Canaveral at 6:59 p.m. EDT. Here's a look at some stats about today's mission. This will be:

• The 368th Delta rocket launch since 1960
• The 27th Delta 4 rocket mission since 2002
• The 12th Medium+ 4,2 configuration to fly
• The 41st main engine from RS-68 family used
• The 41st-42nd GEM-60 solid rocket motors flown
• The 449th production RL10 engine to be launched
• The 30th RL10B-2 engine launched
• The 22nd Delta 4 rocket launch from Cape Canaveral
• The 22rd use of Delta 4 by the Air Force
• The 73rd Evolved Expendable Launch Vehicle flight
• The 85th United Launch Alliance mission since 2006
• The 33rd ULA launch for the Air Force
• The 20th Delta 4 under the ULA banner
• The 8th ULA launch this year
• The 4th launch of the Delta family in 2014
• The 1st and 2nd GSSSAP satellites
• The 1st secondary payload ring on Delta 4

Weather remains GO at this time. However, there's storms to the west marching toward the launch pad. The weather officer says the beginning of the launch window is the best chance to fly tonight.

Now 45 minutes till launch! The Delta 4 rocket launching GSSAP and ANGELS is known as the Medium+ (4,2) model. It has a common first stage with two solid rocket boosters, a cryogenic second stage and a 4-meter-diameter payload shroud.

The first stage is fueled by supercold liquid hydrogen and liquid oxygen. The RS-68 main engine, made by Aerojet Rocketdyne, generates about 663,000 pounds of thrust. Known as the Common Booster Core, or CBC, the stage measures about 150 feet in length, 16 feet in diameter and weighs 54,000 pounds unfueled.

The strap-on solids are known as Graphite Epoxy Motors, or GEM 60s, built by ATK. They are five feet in diameter, 53 feet long and generate 280,000 pounds of thrust each.

The second stage features a restartable Aerojet Rocketdyne RL10B-2 engine burning liquid hydrogen and liquid oxygen. The total thrust is 24,750 pounds.

Protecting the payload during atmospheric ascent is the payload fairing measuring 39 feet in length and 13 feet in diameter. It is a composite nose cone built in two halves.

The Delta 4 stands 205 feet tall and generates about 1.2 million pounds of thrust at liftoff.

First stage liquid hydrogen conditioning for flight is complete.

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All weather rules are GO.

The flight hazard area has been established.

Now entering into the final 75 minutes of the countdown to launch of Delta 368 and the Geosynchronous Space Situational Awareness Progress satellites.

The rocket stands fueled and ready for launch at 6:59 p.m. EDT today. The launch team is not reporting any significant issues, but the weather remains a concern.

Upper stage fuel and oxidizer conditioning for flight iscomplete.

The first stage liquid oxygen tank is conditioned for flight.

If you are need tips on picking a good viewing spot, check out this authoritative guide on where to go.

Engineers are conducting the standard evaluation of the Delta 4 rocket's thermal insulation following the loading of supercold propellants into the vehicle.

Now two hours until launch.

The vehicle is fully fueled! Loading of the upper stage liquid oxygen tank has been accomplished.

Loading of the upper stage liquid hydrogen tank has been accomplished as fueling proceeds this afternoon at Complex 37. The launch team has filled the tank with propellant for the RL10 engine.

Fast-filling of the first stage liquid hydrogen tank is complete. After post-filling checks and valve tests, the tank will be placed in topping mode. The launch team will confirm the propellant is conditioned for flight.

The first stage liquid oxygen loading just finished. The tank has been loaded with its supercold oxidizer that is chilled to Minus-298 degrees F. Topping will be completed as the count rolls on.

A check of the weather shows a current NO GO condition for anvil clouds. The launch time forecast still calls for scattered and broken decks of clouds, thunderstorms in the vicinity, southerly winds of 12 to 17 knots and a temperature of 83 degrees F.

The Delta 4 rocket's Common Booster Core first stage and upper stage are being loaded with supercold liquid oxygen and liquid hydrogen.

Complex 37 has two giant sphere-shaped fuel tanks to store the cryogenic liquid oxygen and liquid hydrogen. The LOX tank holds 250,000 gallons and LH2 sphere about 850,000 gallons.

The cryogenics are fed from the storage tanks through pipelines to the pad. For the Common Booster Core, the propellants are routed up to the launch table upon which the rocket sits. Tail service masts, the large box-like structures at the base of the vehicle, feed the oxygen and hydrogen to the booster via separate umbilicals.

The upper stage receives its cryos from the middle swing arm that extends from the Fixed Umbilical Tower to the front-side of the rocket.

Chilldown of the upper stage liquid oxygen system is complete for loading the rocket's tank.

The "go" has been given for the upper stage liquid oxygen chilldown in advance of filling that tank.

First stage liquid oxygen tanking operation is switching from "slow-fill" to "fast-fill" mode. The rocket will be loaded with 40,000 gallons of supercold LOX.

The first stage liquid oxygen chilldown is complete. "Slow-fill" mode is beginning to load a small percentage of the tank. The process then speeds up to the "fast-fill" mode until the tank is nearly full.

The launch team is preparing to start fueling the Delta 4 rocket's upper stage. The "go" has been given to start the chilldown conditioning of the upper stage liquid hydrogen system.

First stage liquid hydrogen tanking operation is switching from "slow-fill" to "fast-fill" mode.

And now the chilldown of Delta's first stage liquid oxygen system is starting. This preps the tank and pumping to guard against shock when the supercold oxidizer begins flowing into the rocket a short time from now.

Liquid hydrogen flow to the first stage is confirmed. Some 110,000 gallons of LH2 will fill the rocket's tank.

The cold gas chilldown conditioning of the liquid hydrogen system has been accomplished. Liquid hydrogen propellant will begin to flow into the first stage in "slow-fill" mode. That is sped up to "fast-fill" after a small portion of the tank is loaded.

Chilled to Minus-423 degrees Fahrenheit, the liquid hydrogen will be consumed by the RS-68 main engine along with liquid oxygen during the first four minutes of the launch.

And fueling operations have begun. The hydrogen system's cold gas chilldown conditioning is underway.

A "go" has been given to start the cold gas chilldown conditioning of the first stage liquid hydrogen system. This is the precursor to filling the vehicle with propellant.

T-minus 4 hours, 15 minutes and counting! The team has been polled and is ready for cryogenic fueling as the countdown is underway for today's opportunity to launch the Delta 4 rocket with the GSSAP satellites.

The launch team is manning stations for the start of fueling operations.

T-minus 4 hours, 15 minutes and holding. The countdown has entered a 15-minute built-in hold, a pre-planned pause designed to give the team time to catch up on any work that could be running behind schedule.

A check of the current weather shows all of the rules are GO at the present time. The forecast for launch time still predicts thunderstorms in the vicinity and a 30 percent chance of acceptable weather.

The issue with the ground support equipment environmental control system has been fixed and retested, United Launch Alliance reports, and liftoff is reset for tonight at 6:59 p.m. EDT;

To recap, a device the provides environmentally-controlled commodities to the vehicle shut down at the launch pad. There was little that could be accomplished remotely. So the decision has been made to scrub for today so the issue can be addressed. Liftoff is retargeted for Thursday night at 6:59 p.m. EDT. Weather is 30 percent favorable.

SCRUB. Launch has been scrubbed for 24 hours.

T-minus 1 hour, 40 minutes and holding. The countdown has been stopped for an unplanned hold. The team is evaluating a cooling device at the launch pad and that has interrupted cryogenic tanking operations. There is no estimate how long this hold will last.

The first stage liquid oxygen loading just finished. The tank has been loaded with its supercold oxidizer that is chilled to Minus-298 degrees F. Topping will be completed as the count rolls on.

Loading of the upper stage liquid hydrogen tank has been accomplished as fueling proceeds this afternoon at Complex 37. The launch team has filled the tank with propellant for the RL10 engine.

Weather has improved to 60 percent chance of favorable conditions for tonight's launch window. All conditions remain GO at the current time.

Fast-filling of the first stage liquid hydrogen tank is complete. After post-filling checks and valve tests, the tank will be placed in topping mode. The launch team will confirm the propellant is conditioned for flight.

Chilldown of the upper stage liquid oxygen system is complete for loading the rocket's tank.

The Delta 4 rocket's Common Booster Core first stage and upper stage are being loaded with supercold liquid oxygen and liquid hydrogen.

Complex 37 has two giant sphere-shaped fuel tanks to store the cryogenic liquid oxygen and liquid hydrogen. The LOX tank holds 250,000 gallons and LH2 sphere about 850,000 gallons.

The cryogenics are fed from the storage tanks through pipelines to the pad. For the Common Booster Core, the propellants are routed up to the launch table upon which the rocket sits. Tail service masts, the large box-like structures at the base of the vehicle, feed the oxygen and hydrogen to the booster via separate umbilicals.

The upper stage receives its cryos from the middle swing arm that extends from the Fixed Umbilical Tower to the front-side of the rocket.

The "go" has been given for the upper stage liquid oxygen chilldown in advance of filling that tank.

First stage liquid oxygen tanking operation is switching from "slow-fill" to "fast-fill" mode. The rocket will be loaded with 40,000 gallons of supercold LOX.

Now three hours until launch. Weather remains GO.

The first stage liquid oxygen chilldown is complete. "Slow-fill" mode is beginning to load a small percentage of the tank. The process then speeds up to the "fast-fill" mode until the tank is nearly full.

First stage liquid hydrogen tanking operation is switching from "slow-fill" to "fast-fill" mode.

With today's countdown going very smoothly, the launch team is preparing to start fueling the Delta 4 rocket's upper stage. The "go" has been given to start the chilldown conditioning of the upper stage liquid hydrogen system.

And now the chilldown of Delta's first stage liquid oxygen system is starting. This preps the tank and pumping to guard against shock when the supercold oxidizer begins flowing into the rocket a short time from now.

Liquid hydrogen flow to the first stage is confirmed. Some 110,000 gallons of LH2 will fill the rocket's tank.

The cold gas chilldown conditioning of the liquid hydrogen system has been accomplished. Liquid hydrogen propellant will begin to flow into the first stage in "slow-fill" mode. That is sped up to "fast-fill" after a small portion of the tank is loaded.

Chilled to Minus-423 degrees Fahrenheit, the liquid hydrogen will be consumed by the RS-68 main engine along with liquid oxygen during the first four minutes of the launch.

And fueling operations have begun. The hydrogen system's cold gas chilldown conditioning is underway.

A "go" has been given to start the cold gas chilldown conditioning of the first stage liquid hydrogen system. This is the precursor to filling the vehicle with propellant.

T-minus 4 hours, 15 minutes and counting! The team is ready for cryogenic fueling as the countdown is underway for today's opportunity to launch the Delta 4 rocket with the GSSAP satellites.

The launch team is manning stations for the start of fueling operations.

T-minus 4 hours, 15 minutes and holding. The countdown has entered a 15-minute built-in hold, a pre-planned pause designed to give the team time to catch up on any work that could be running behind schedule.

A check of the current weather shows all of the rules are GO at the present time. The forecast for launch time still predicts thunderstorms in the vicinity and a 30 percent chance of acceptable weather.

The GO has been given to start liquid oxygen and liquid hydrogen fueling preparations.

The Delta 4 rocket's RIFCA flight computer is powered up for flight and alignment is stable.

Technicians have finished all hands-on work at the launch pad and Complex 37 has been cleared of personnel in advance of fueling the rocket's two stages this afternoon. Pad systems and equipment stand ready for fueling activities, which should kick off shortly.

T-minus 5 hours, 15 minutes and counting! The countdown has commenced for this evening's scheduled launch of the Delta 4 rocket to deliver the GSSAP satellites into orbit for the United States military.

The count has a planned built-in hold at T-minus 4 minutes, leading to liftoff at 7:03 p.m. EDT (2303 GMT).

Check out photos of the Delta 4 rocket during rollback of the launch pad's mobile gantry this morning.

The 330-foot tall mobile service tower has been retracted from the Delta 4 rocket at Cape Canaveral's pad 37B for this evening's launch that will place the GSSAP geosynchronous orbit surveillance satellites into space.

The wheeled structure just moved along rail tracks to its launch position about the length of a football field away from the rocket. The 9-million pound tower shielded the Delta from the elements during the its stay on the pad, provided workers 360-degree access to the various areas on the vehicle and was used to attach the strap-on solid motors and the payload during the launch campaign. The tower is 90-feet wide and 40-feet deep.

Crews will spend the next couple of hours securing the complex for launch before leaving the danger area around the pad. All workers must be clear of the area for the start of hazardous operations in the countdown, which include fueling the Delta 4's Common Booster Core first stage and the second stage with supercold liquid oxygen and liquid hydrogen propellants.

Testing of communications links between the rocket and Air Force Eastern Range will occur after fueling is accomplished. Steering checks of the first stage RS-68 engine and second stage RL10 powerplant are on tap in the last hour of the count.

A build-in hold is slated for T-minus 4 minutes, during which time teams will go through final polling to grant clearance to launch. The Delta 4 will transition to internal power as the count resumes, ordnance will be armed and the propellant tanks pressurized as clocks target the main engine ignition time at T-minus 5 seconds.

Liftoff remains scheduled for 7:03 p.m. EDT (2303 GMT).

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The mobile service tower at Cape Canaveral's Complex 37 is rolling away from the Delta 4 rocket that is scheduled to carry the Geosynchronous Space Situational Awareness Program satellites into orbit at 7:03 p.m. EDT this evening.

Weather continues to be 30 percent favorable for launch this evening.

"An upper level low in the Eastern US is suppressing the Bermuda High ridge to the south causing southwest winds in the low- and mid-levels of the atmosphere. Given the unstable, moist atmosphere, thunderstorms will develop near noon as the sea breeze forms. Phase I and II lightning watches and warnings are likely to be issued early in the countdown," forecasters report.

"Thunderstorms will gradually move inland during the mid-afternoon, but late in the day the west coast sea breeze thunderstorm activity will reach the east coast. The high chance of thunderstorms in the area causes concern for multiple lightning launch commit criteria violations during the launch window. As for space weather, there are no significant sunspots of concern; therefore, solar activity is low.

"The primary concerns for launch are anvil clouds, lightning, and cumulus clouds.

"For a 24-hour delay, thunderstorms will again be in the area, and there is a 70% chance of violating weather launch commit criteria."

The first pair of Geosynchronous Space Situational Awareness Program surveillance satellite and their Delta 4 rocket booster have been cleared for blastoff Wednesday from Cape Canaveral.

The GSSAP spacecraft are targeting a 7:03 p.m. EDT launch from Complex 37.

Managers gathered this morning for the Launch Readiness Review that culminated with the consensus to proceed with picking up the countdown.

Weather forecasts predict a 30 percent chance of acceptable conditions during the launch window.

We will have complete live coverage of the count and launch on this page.

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Twin inspector spacecraft and a microsatellite testbed will share a Delta 4 rocket ride into space Wednesday evening from Cape Canaveral.

Read our preview story.

Summertime thunderstorms in the afternoon are a fact of life in Florida, so there could be a challenge to launching the Delta 4 rocket Wednesday evening from Cape Canaveral. Forecasters are giving only a 40 percent chance of meeting the launch rules due to anvil clouds, lightning and cumulus clouds.

"The Bermuda high pressure ridge is located over the area resulting in light southerly flow. The sea breeze will develop in the early afternoon and move inland throughout the day. Isolated storms may form along the sea breeze initially, but the majority of storms today will be inland," the Air Force weather team reports.

"Over the next few days, a weak upper level trough will move into Florida, and moisture will increase in the atmosphere. Afternoon storm coverage will increase, and storms will potentially form each day near the coast as the sea breeze develops. Storms will migrate inland with the sea breeze initially and then return back to the space coast late in the day due to southwesterly steering flow winds and the west coast sea breeze.

"Wednesday, the upper level low may retrograde to the west, but there is still a good chance for inland storms to affect the coast both early in the afternoon and again late in the day."

The launch time outlook includes scattered clouds, a broken deck of high clouds, inland thunderstorms, good visibility, south-southeasterly winds and a temperature of 83 degrees F.

The Air Force has announced next Wednesday's United Launch Alliance Delta 4 rocket's target launch time: 7:03 p.m. EDT (2303 GMT).

The T-0 falls within the four-hour launch "period" of 6 to 10 p.m. EDT announced previously. The actual launch "window" won't be revealed, officials say.

Two spacecraft that will track man-made objects and deter threats in geosynchronous orbit were hauled to the launch pad today and mounted atop a United Launch Alliance Delta 4 booster rocket.

Twin Geosynchronous Space Situational Awareness Program satellites, or GSSAP, will be launched into orbit on July 23 from Cape Canaveral, Florida.

Read our full story.