The Pentagon's Inspector General is investigating whether aides of Defence Secretary Pete Hegseth were asked to delete Signal messages containing sensitive military information shared with a reporter. The probe focuses on the sharing of information regarding US air strikes on Houthi targets in Yemen. Hegseth claims the information was unclassified, but military officials argue that details shared before a strike would not have been cleared for unsecured devices. Hegseth is scheduled to testify before Congress amid scrutiny over his handling of sensitive information and security issues at the Pentagon.