A United Launch Alliance Atlas 5 rocket made its third trip to a Cape Canaveral launch pad Thursday, rolling into position for liftoff Friday afternoon with a classified payload for the U.S. government’s spy satellite agency.

Four astronauts flying on SpaceX’s Crew Dragon “Resilience” spacecraft reached the International Space Station late Monday, one day after launching from the Kennedy Space Center in Florida. The capsule autonomously docked with the space station at 11:01 p.m. EST Monday (0401 GMT Tuesday).

The United Launch Alliance Delta 4 rocket has taken off tonight from Cape Canaveral, headed for space to deploy a satellite bought by allied nations to bolster the U.S. military global communications infrastructure.