Photos: Atlas 5/MMS launch gallery

Ready for blastoff just after sunset Wednesday with a classified payload for the U.S. government’s spy satellite agency, a United Launch Alliance Atlas 5 rocket rolled out to its launch pad at Cape Canaveral late Tuesday afternoon after an unplanned trip back inside its integration building for repairs.

NASA and SpaceX officials briefed the media Wednesday on the planned launch of a Falcon 9 rocket and Dragon cargo capsule on a resupply flight to the International Space Station.

A Russian Soyuz-2.1b booster is standing at the Complex 31 launch pad at the Baikonur Cosmodrome in Kazakhstan for liftoff with 34 OneWeb broadband satellites early Friday, local time.