The Pentagon set up a system in Defense Secretary Pete Hegseth's office that enabled him to check messages on the encrypted messaging app Signal while at the office, sources familiar with the matter told CBS News. Two of the sources said the system bypasses standard Defense Department security protocols.

The Department of Defense (DOD) is again under scrutiny after a turbulent week of departures, and a second reported Signal group chat involving Secretary of Defense Pete Hegseth.Here's a look at the latest on the DOD shakeups.

Pete Hegseth was barely able to get confirmed as Donald Trump’s Defense secretary, and following a series of scandals — including the revelation that he shared U.S. war plans in a second Signal group chat last month — it’s entirely possible that he will be the first member of Trump’s Cabinet to either resign or be forced out not even 100 days into Trump’s second term.