Defense Secretary Pete Hegseth and other members of the Trump administration are being investigated for their recent use of a ...

In the wake of an explosive report that senior Trump administration officials discussed planned military strikes in a Signal ...

Sen. Roger Wicker, chairman of the Senate Armed Services Committee, penned a letter seeking an expedited inspector general ...

The Pentagon warned against using Signal in a memo just last week, according to NPR. It cited threats from Russian hackers.

Hegseth and other top administration officials have said that no classified information was shared in a Signal messaging app ...

Officials inadvertently added a reporter to an unsecured group chat discussing plans for a U.S. attack on Houthis in Yemen. Here's a look at a timeline of the events.

Defense officials say Dan Caldwell, a senior adviser to Defense Secretary Pete Hegseth, has been placed on administrative ...

National security adviser Mike Waltz and Defense Secretary Pete Hegseth confer at an event at the White House on Feb. 24. (Ludovic Marin/Pool via AP) ...

Director of National Intelligence Tulsi Gabbard and Secretary of State Marco Rubio -- were part of a group chat on Signal where they discussed upcoming strikes against Yemen's Houthi rebels.

Top Trump administration officials used messaging app Signal to share war plans and ... calls by Democratic lawmakers for a congressional investigation into the security breach.