President Trump's order to declassify UFO files faces internal Pentagon resistance amid claims of 'demonic' and 'interdimensional' fears.

Since the start of the year, state and local law enforcement officers working under agreements with ICE have picked up more ...

For the first State of the Union address of his second term, US President Donald Trump sought to paint a rosy picture of his ...

Can NASA and Elon Musk get us to Mars and beyond?

Throughout Trump's remarks, ABC News live fact-checked some of the president's statements for exaggerations, falsehoods and ...