An FBI official says a rented moving truck parked at a curb at the Dallas-Fort Worth airport caused a brief scare on the 10th anniversary of the Sept. 11 terrorist attacks.

FBI official Kevin Gentry says the truck was driven by a crew member of the Discovery Channel show "Sons of Guns." Investigators were suspicious because the driver said, "I got a couple of guns," but Gentry says he was just waiting for a co-worker. The two will film in El Paso and Albuquerque, N.M.

Airport spokesman David Magana says a bomb squad and canine units were deployed when an automatic weapon was found in the truck, parked in an area where troops returning from Middle East stints are greeted.

A Discovery Channel spokesman was not immediately available to comment.