SpaceX launch crews rolled out the company’s next Falcon 9 rocket to pad 39A at the Kennedy Space Center in Florida, then lifted the two-stage launcher vertical for a hold-down engine firing Thursday in preparation for launch next week with a South Korean-owned commercial communications satellite.

A United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral at 12:13 p.m. EDT (1613 GMT) Saturday to deploy a new Global Positioning System satellite.

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.