Live coverage: Atlas 5 countdown and launch journal

The United Launch Alliance Atlas 5 rocket stands poised for flight with the Air Force’s X-37B spaceplane and a batch of CubeSats including the LightSail. The rocket was rolled to Complex 41 on Tuesday in preparation for launch on Wednesday.

A replay of the United Launch Alliance Delta 4 rocket launching the Air Force’s Wideband Global SATCOM communications satellite No. 7 from Cape Canaveral, Florida.

Equipped with a robot arm, sample collector and return capsule, NASA’s asteroid-bound OSIRIS-REx probe emerged from its pristine factory and flew to the launch site in Florida on Friday.