4K video: Wide-angle view of Falcon 9 hotfire

The quartet touched down at the Launch and Landing Facility around 1:45 p.m. EST (1845 UTC). They’re set to launch aboard a SpaceX Falcon 9 rocket on Friday, March 1, at 12:04 a.m.

The first launch for Iridium’s next-generation mobile communications fleet has been pushed back four months — from December until April — to resolve a technical problem inside the spacecraft’s Ka-band communications payload.

Cocooned inside the nose cone of its Falcon 9 rocket booster, the U.S. Air Force’s X-37B spaceplane journeyed from a former space shuttle hangar at NASA’s Kennedy Space Center, past the Vehicle Assembly Building and toward launch pad 39A last week ahead of liftoff Thursday.