Photos: Tuesday’s Atlas 5 rollout

United Launch Alliance recently raised a Delta 4-Heavy rocket, one of four left in the company’s backlog, vertical on its launch pad at Vandenberg Air Force Base in California in preparation for liftoff with a top secret U.S. government spy satellite at the end of April.

One day after a Soyuz crew transport rolled out to a launch pad at the Baikonur Cosmodrome in Kazakhstan, a similar Russian booster made a comparable journey Monday halfway around the world in tropical French Guiana for liftoff Thursday with two European Galileo navigation satellites.

NASA has announced that veteran astronauts Joe Acaba and Ricky Arnold will launch on nearly six-month expeditions aboard the International Space Station starting in September and in March 2018, filling seats aboard Russian Soyuz spaceships recently acquired in a commercial arrangement with Boeing.