SpaceX chief Elon Musk said Thursday he would begin "decommissioning" his company's Dragon spacecraft -- vital for ferrying NASA astronauts to and from the International Space Station -- after President Donald Trump threatened to terminate his government contracts.

"In light of the President's statement about cancellation of my government contracts, @SpaceX will begin decommissioning its Dragon spacecraft immediately," Musk wrote on X.

The comments came after Trump and Musk's nearly year-long political alliance imploded in spectacular fashion, with the two trading public insults on social media.

SpaceX's Crew Dragon -- a gumdrop-shaped capsule that flies atop a Falcon 9 rocket and splashes down in the ocean -- is currently the only US spacecraft certified to carry crew to the ISS under

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