Photos: Delta 4 awaits blastoff

For the fifth time in four years, a massive U.S. Navy satellite will launch atop an Atlas 5 rocket on Friday to finish the military’s new $7.7 billion mobile communications framework 22,300 miles in space.

The uncrewed flight of the spacecraft is still going through testing and analysis before NASA green lights a return to flight mission.

Watch a replay of the launch of an Atlas 5 rocket carrying the $1.2 billion SBIRS GEO Flight 4 satellite into orbit.