PITTSBURGH — A Pitcairn man faces charges after police say his loaded gun was stopped at the Pittsburgh International Airport security checkpoint on Saturday morning. The Allegheny County Police Department says TSA officers noticed a loaded revolver in a passenger’s carry-on bag at the security checkpoint around 6:15 a.m. ACPD responded and later identified the passenger as Justin Lang, 26. The department determined he did not possess a valid concealed carry permit. Lang was charged with carrying a firearm without a permit, and the FBI was notified of the incident. Civil penalties for bringing a weapon into a checkpoint can reach up to $17,000, depending on the specific weapon and the circumstances.