Live coverage: Atlas 5 countdown and launch journal

Already encapsulated in the 18-foot-diameter nose cone, the Air Force’s X-37B spaceplane is hoisted atop the Atlas 5 rocket at Cape Canaveral’s Vertical Integration Facility.

Liftoff of the resupply mission, atop a Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Space Force Station is scheduled for 6:05 p.m. EDT (2205 UTC). The Cargo Dragon is loaded with 6,500 pounds of science and supplies for the space station.

During a visit to Cape Canaveral this week, NASA astronauts Doug Hurley and Bob Behnken strapped in to the SpaceX crew capsule they will ride into orbit as soon as mid-to-late May. Next week, the astronauts will be in Houston to continue training for an extended stay on the International Space Station that could last two-to-three months.