NASA and Pentagon officials moved swiftly this past week to urge competitors to Elon Musk’s SpaceX to more quickly develop alternative rockets and spacecraft after President Donald Trump threatened to cancel Space X’s contracts and Musk’s defiant response.

U.S. President Donald Trump is not interested in talking with Elon Musk, a White House official said on Friday, signaling the president and his former ally might not resolve their feud over a sweeping tax-cut bill any time soon.

Elon Musk says that he's cutting off NASA's access to space, in a potentially devastating blow to the United States' space program.

Elon Musk is dialing back his threat to decommission a capsule used to take astronauts and supplies to the International Space Station for NASA.