Live coverage: Three-man station crew lands in Kazakhstan

SpaceX’s first Crew Dragon spacecraft, fixed to the forward end of a Falcon 9 rocket, emerged Thursday from the company’s hangar at the Kennedy Space Center in Florida for the quarter-mile journey to its launch mount at pad 39A, where liftoff is scheduled early Saturday on a critical test flight before astronauts strap into the ship later this year.

A Northrop Grumman Antares rocket stands on pad 0A at Wallops Island, Virginia, on a frigid morning hours before a planned liftoff with more than 8,000 pounds of cargo heading for the International Space Station.

Boeing and SpaceX hope to launch commercial crew ferry ships on long-awaited test flights later this year, but both companies face major challenges getting the spacecraft certified before late 2019 when seats aboard Russian Soyuz spacecraft will no longer be easily available for NASA space station crews, officials told lawmakers Wednesday.