MOON TOWNSHIP, Pa. (WPXI) — A loaded handgun was found in a passenger’s carry-on bag at the main security checkpoint at Pittsburgh International Airport Thursday evening. According to a release from Allegheny County police, TSA screeners saw the loaded 9mm gun in the person’s bag and alerted police. Investigators said the 34-year-old man had a valid concealed carry permit and accidentally left the firearm in his bag. The passenger was permitted to fly after authorities notified the FBI of what happened. No charges are expected to be filed, but county police still have the man’s weapon.