Musk's SpaceX set for debut astronaut mission, renewing NASA's crewed launch program

Ending the US space agency's nine-year hiatus in human spaceflight.

Entrepreneur Elon MUS$k's SpaceX is set to launch two American astronauts to the International Space Station on Wednesday from NASA's Kennedy Space Center in Florida, ending the US space agency's nine-year hiatUS$ in human spaceflight.

California-based SpaceX's Crew Dragon capsule carrying astronauts Doug Hurley and Bob Behnken and its Falcon 9 rocket is due to lift off at 4:33 p.m. EDT (2033 GMT) on Wednesday from the same launch pad US$ed by NASA's last space shuttle mission in 2011.

President Donald Trump and Vice President Mike Pence will view the launch in person, a White HoUS$e spokesman said.

For MUS$k, SpaceX and NASA, a safe flight would mark a milestone in the quest to produce reusable spacecraft that can make space travel more affordable. MUS$k is the founder and CEO of SpaceX and CEO of Tesla Inc.

"Bob and I have been working on this program for five years, day in and day out," Hurley, 53, said as he and Behnken, 49, arrived at the Kennedy Space Center from Houston last week. "It's been a marathon in many ways, and that's what you'd expect to develop a human-rated space vehicle that can go to and from the International Space Station."

NASA, hoping to stimulate a commercial space marketplace, awarded US$3.1 billion to SpaceX and US$4.5 billion to Boeing Co to develop dueling space capsules, experimenting with a contract model that allows the space agency to buy astronaut seats from the two companies. 

Boeing's CST-100 Starliner capsule is not expected to launch its first crew until 2021.

NASA Administrator Jim Bridenstine declared the mission a "go" last week at Kennedy Space Center after space agency and SpaceX officials convened for final engineering checks.

SpaceX successfully tested Crew Dragon without astronauts last year in its first orbital mission to the space station. That vehicle was destroyed the following month during a ground test when one of the valves for its abort system burst, causing an explosion that triggered a nine-month engineering investigation that ended in January.