Video: Change of command aboard International Space Station

Watch a replay of Monday’s Falcon 9 launch as seen from the Kennedy Space Center press site, a viewpoint around three miles from pad 39A.

A rocket booster SpaceX used to launch a planet-hunting NASA observatory two months ago fired again Saturday at Cape Canaveral, clearing a major pre-flight checkout before blastoff June 29 with a space station supply ship.

After a two-day readiness review, NASA managers gave a green light Friday for SpaceX to proceed with final preparations for launch next Wednesday, May 27, of a commercial spaceship carrying astronauts Doug Hurley and Bob Behnken to the International Space Station on the first orbital spaceflight from U.S. soil since 2011.