No, really. From "N.C. airport workers arrested on alleged immigration violations":

Nine workers who service U.S. Navy planes at a Winston-Salem airport were arrested Tuesday on alleged immigration violations...

The "Operation Shield America" raid at Smith-Reynolds Airport is aimed at finding illegal aliens doing work for the Pentagon.

Reports also said that those arrested were working on P-3 Orions - surveillance planes known as "submarine killers."

...The arrests come two months after federal authorities arrested 27 workers at the Piedmont/Triad International Airport in Greensboro for using counterfeit documents...

These are just the latest in a long series of such incidents. Start in "DHS: Naval contractor employed 86 illegal aliens".