A passenger boarded a plane at Milwaukee General Mitchell airport, but realized he had left some shotgun shells in his bag. Being a good citizen, he reported this to the flight attendant, who informed the pilot.
The plane then returned to the gate so the passenger could turn the ammo into the local police. The man was re-screened, and allowed back on the plane.
After the failed terror attempt on Christmas day, one would expect TSA agents to be extra vigilant. The agency has been asking for more money to invest in full body scanners, and other detection equipment. But at the end of the day, even the most impressive piece of equipment in the world becomes another useless gadget when staffed by idiots.