Explosives detection labrador retriever K9 Rrall sniffs a trash can for the scent of explosives at Will Rogers Airport in Oklahoma City, Tuesday, Nov. 20, 2012, as travelers head out of

 

              Explosives detection labrador retriever K9 Rrall sniffs a trash can for the scent of explosives at Will Rogers Airport in Oklahoma City, Tuesday, Nov. 20, 2012, as travelers head out of
Explosives detection labrador retriever K9 Rrall sniffs a trash can 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)