Second lady Usha Vance is set to travel to Greenland this week as President Donald Trump continues to suggest the U.S. could ...

The Pentagon said it would investigate purported leaks of national security information, saying that the probes could include polygraph tests.

The Pentagon is investigating leaks of national security information, including using polygraph tests, one day after media ...

In an industry that moves at breathtaking speed, defining what technology is at the frontier or enabling access to it is a ...

The Pentagon’s intelligence and law enforcement arms are investigating what it says are national security leaks — personnel ...

P resident Donald Trump has made good on his promise of revoking security clearance for former President Joe Biden. Issued ...

President Trump has revoked the security clearances for Joe Biden, Kamala Harris, Hillary Clinton, Liz Cheney and the entire Biden family.

President Donald Trump has rescinded security clearances for a number of people, including Joe Biden and Kamala Harris.

I have determined that it is no longer in the national interest for the following individuals to access classified information,” Trump wrote in the memo to the heads of executive departments and ...

History buffs have uncovered revelations about U.S. espionage in the 1960s in thousands of pages of newly released government ...

President Donald Trump revoked security clearances for Joe Biden, Kamala Harris and a string of top Democrats and political ...