Redeploying Homeland Security Investigations agents is part of a broader Trump effort. But some fear many serious transnational crimes will go unprobed.

Multiple government officials are telling ABC News that America is now facing a "national security crisis" because President Donald Trump's administration has fired hundreds of National Nuclear ...

The National Nuclear Security Administration dismissed hundreds of employees as part of Trump's effort to shrink the federal ...

U.S. President Donald Trump and billionaire ally Elon Musk's push to radically overhaul the federal government is now ...

FBI interviewed David Headley for information. He was also an informant for DEA, which, along with CIA, may have used him to ...

During her first full day as director of national intelligence, Tulsi Gabbard will meet with U.S. allies at the Munich Security Conference.

Donald Trump secured the transfer of Marc Fogel, an American detainee in Russia, back to the United States. A U.S. official ...

The U.S. government wants to select "disparate" locations where it could eventually make bomb-grade uranium again.

WASHINGTON (AP) — The Army was one of 28 government agencies authorized to fly helicopters near Ronald Reagan National ...

WASHINGTON (AP) — Forced leaves began in Washington and worldwide Friday for most employees of the U.S. Agency for ...

The agency noted that the drone unit had swiftly reported the adversary’s location to the command for a strike ...

Donald Trump's picks to lead the US intelligence community and top law enforcement agency were assailed ... of Congress as having imperiled national security. She also faced questions over her ...