A Washington County man was prevented from bringing a loaded handgun onto his flight this morning when Transportation Security Administration officers at Pittsburgh International Airport detected it in his carry-on bag. Authorities say the 9mm handgun was loaded with 11 bullets, including one in the chamber. The officer spotted the gun in the checkpoint X-ray machine. Airport police confiscated the weapon and the man, a Canonsburg resident, now faces a federal financial penalty. Passengers are permitted to travel with firearms, but only unloaded weapons and only in checked baggage.