The role of Elon Musk's SpaceX in an ambitious new U.S. missile defense system is in question following the dramatic feud ...

President Donald Trump threatened to cut government contracts with Elon Musk amid feud, while the SpaceX CEO suggested ...

It's unclear if Musk was trolling or being serious, but he responded to Trump's threats by saying SpaceX will begin decommissioning its Dragon spacecraft, which has been used for years to ferry ...