Elon Musk and Donald Trump’s feud has officially gone interstellar. In a stunning escalation, Musk threatened to “decommission” SpaceX’s Dragon spacecraft — the only active U.S. vehicle capable of sending astronauts to space — after Trump vowed to terminate all government contracts and subsidies,

Elon Musk’s threat to pull his Dragon spacecraft out of NASA programs would severely impact the International Space Station and other programs.

The space agency relies on Elon Musk’s rockets for crucial missions to the International Space Station. Who will replace them when competitors are still playing catch up?