Photos: X-37B gallery archive

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.

Watch a replay of the Atlas 5 rocket soaring into space on 14 April carrying multiple U.S. Air Force communications and tech demo satellites.

When the next Delta 4 rocket flies in July, as well as all future ones to come, the enhanced RS-68A main engine will power the boosters off the launch pad.