A Pentagon-wide advisory that went out one week ago warned against using Signal, the messaging app, even for unclassified ...

WASHINGTON — The Pentagon inspector general announced Thursday that it has launched an investigation into the leak of attack plans ... were associated with Signal chat blunder.

GOP Congressman Marlin Stutzman says he trusts Trump to determine the appropriate consequences for those involved in the ...

Three Pentagon officials who were placed on leave as part of an investigation into leaks at the Department of Defense slammed ...

Political fallout is mounting as some Republicans are breaking with the White House on the severity of the leak.

Defense Secretary Pete Hegseth on Tuesday fended off a reporter’s questions about a leaked Signal chat group about forthcoming strikes on the Houthis in Yemen.

But, alas, the chat is real, which Goldberg discovered after the chat decided on U.S. airstrikes on Houthi targets in Yemen, ...

Charlie Savage writes about national security and legal policy. What the Leak Revealed: Our reporters discuss what the Signal chat leak revealed about the Trump administration and the state of ...

Central Intelligence Agency (CIA) director John Ratcliffe said Tuesday that the use of Signal among government officials is “permissible” for ...

“I think Signal could be defective ... Still, Mr. Trump said that he was ultimately not concerned about the leak, proclaiming that “there was no harm done, because the attack was unbelievably ...

The president of Signal defended the messaging app's security on Wednesday after top Trump administration officials ...

Dan Caldwell, a top adviser to Defense Secretary Pete Hegseth, and Darin Selnick, Hegseth’s deputy chief of staff, have both ...