On Sunday, a loaded .38-caliber handgun fell out of a duffle bag being placed into the baggage compartment of an Alaska Airlines flight from LA, California to Portland, Oregon. It was turned over to airport police and the owner, who had not declared it, was allowed to take a later flight. Air travelers are familiar with pat-downs, limits on liquids and full-body scans. But while the Transportation Security Administration does not allow passengers to carry firearms onto airplanes, the TSA says guns in checked baggage are not its responsibility. Abby Sewell reports for the Los Angeles Times.