The inspector general’s investigation focuses on how information about the March 15 airstrikes on Houthi targets in Yemen was shared on the messaging app.
It's a loss of aircraft worth more than $200 million in what is becoming the most dramatic cost to the Pentagon of the military campaign against the group.
Pete Hegseth reportedly created another Signal chat that included his wife and brother in which he shared details of a military strike on Houthis in Yemen.
The boatswain’s mate, who grew up in Egypt, was awarded for his gutsy role in responding to a pirate attack on a commercial tanker in the Gulf of Aden.