When most people think of the U.S. Secret Service, they picture agents in dark suits guarding the president. But beyond the sunglasses and earpieces lies a lesser-known, but equally vital mandate: ...

Members of Congress questioned the head of the Secret Service on Capitol Hill yesterday. Julia Pierson tried to explain how an intruder with a knife made it all the way to the entrance of the Green ...

Behind locked doors, the Secret Service Headquarters hides rooms, operations, and missions that few outsiders have ever seen. Donald Trump to make televised announcement from Oval Office: What to know ...