Explosives detection Labrador retriever K9 Rrall sniffs bags, passengers, and the air for the scent of explosives at Will Rogers Airport in Oklahoma City, Tuesday, Nov. 20, 2012, as tra

 

              Explosives detection Labrador retriever K9 Rrall sniffs bags, passengers, and the air for the scent of explosives at Will Rogers Airport in Oklahoma City, Tuesday, Nov. 20, 2012, as tra
Explosives detection Labrador retriever K9 Rrall sniffs bags, passengers, and the air for the scent of explosives at Will Rogers Airport in Oklahoma City, Tuesday, Nov. 20, 2012, as travelers head out of town for the Thanksgiving holiday. (AP Photo/Sue Ogrocki)