Q&A with Jeff Bezos, founder of Blue Origin

SpaceX rolled out a Falcon 9 rocket to launch pad 39A early Tuesday for a prelaunch hotfire test before this weekend’s liftoff with a classified payload for the National Reconnaissance Office, the U.S. government spy satellite agency. The static fire test was completed at 3:02 p.m. (1902 GMT).

Astronaut Scott Kelly, re-adapting to gravity, people and wide open spaces after a record 340 days cooped up aboard the International Space Station, said Friday his muscles and joints are a bit sore — “just about all of ’em” — his skin is surprisingly sensitive and “I never felt completely normal up there.”

A SpaceX Dragon capsule packed with more than 5,000 pounds of hardware, provisions and experiments launched July 25 from Cape Canaveral and arrived at the International Space Station two days later.