Photos: Delta 4 launches on secret NROL-45 mission

SpaceX fired up a Falcon 9 rocket at Cape Canaveral Wednesday in a pre-flight test for a Starlink satellite launch Sunday, moving closer to the company’s final mission before sending two NASA astronauts into orbit for the first time May 27.

Watch this replay of Monday’s liftoff of a SpaceX Falcon 9 rocket from Vandenberg Air Force Base in California, followed by touchdown of the booster’s first stage on a drone ship in the Pacific Ocean.

An Earth observation satellite designed to collect three-dimensional mapping imagery rode a Long March 4B rocket into orbit Sunday with three smaller spacecraft, including one to test an innovative French-made iodine thruster, and another satellite built for Sudan.