Live coverage: SpaceX’s Dragon cargo capsule returns to Earth

After a two-month delay to resolve a technical concern, Rocket Lab plans to launch its first commercial mission as soon as June 22, U.S. time, from the company’s rocket base in New Zealand, the company announced Friday.

After a bit of a struggle with a balky bolt, space station commander Peggy Whitson replaced a failed external computer during a short, hurriedly planned spacewalk Tuesday while crewmate Jack Fischer installed a pair of antennas to improve wireless communications during future excursions.

United Launch Alliance’s first Vulcan Centaur rocket completed a critical test-firing of its Blue Origin-built BE-4 main engines Wednesday night, clearing one of two remaining technical hurdles before the launcher is cleared for its inaugural flight later this year.