So was at ORD yesterday in line to put stuff on the xray belt when 2 men walk up, 1 with a big back pack and the other with a 21" roller. They walked with up to the xray machine and showed something to the TSA agent. The agent talked into his radio something about a Code 3 at station 8/9. Another agent came forward, opened the side door that by passes the xray machine and they walk through and keep going.

Who were these people? Air Marshals?