The role of Elon Musk's SpaceX in an ambitious new U.S. missile defense system is in question following the dramatic feud last week between the billionaire entrepreneur and President Donald Trump, ...

President Donald Trump made a bold promise to America minutes after taking the Oath of Office: pledging that an American flag would be planted on Mars. "The United States will once again consider ...

WASHINGTON — Elon Musk's SpaceX and two partners have emerged as frontrunners to win a crucial part of President Donald Trump's "Golden Dome" missile defense shield, six people familiar with the ...