TSA: Tokyo-bound passenger with gun undetected in Atlanta

The U.S. Transportation Security Administration has acknowledged that a passenger bound for Tokyo passed through security in Atlanta with an undetected gun

News outlets cite an agency statement saying the passenger passed through "a standard screening TSA checkpoint with a firearm" at Atlanta's Hartsfield-Jackson International Airport on Jan. 2. The passenger notified Delta Airlines officials after landing at Tokyo's Narita International Airport.

The TSA says standard procedures were not followed during the screening, but further details weren't released. The agency says it "will hold those responsible appropriately accountable."