Video: Delta 4 lifts off

The Delta 4 rocket to launch the next Global Positioning System satellite to sustain the orbiting navigation network has been rolled out to the launch pad.

SpaceX’s 22-story Falcon 9 rocket stands on Cape Canaveral’s Complex 40 launch pad Sunday, hours before the scheduled liftoff of a pair of commercial communications satellites for Eutelsat and Asia Broadcast Satellite.

The United Launch Alliance Atlas 5 rocket stands atop Space Launch Complex 3-East at Vandenberg Air Force Base in California on the eve of Wednesday’s NROL-79 satellite-deployment mission for the National Reconnaissance Office.