Many of the nation's nuclear plants are guarded by specially-trained forces from Wackenhut security. They're manning the front lines in the war on terror.

But video obtained exclusively by CBS News shows a look at what some have been doing on the job, CBS News correspondent Sharyl Attkisson reports.

They've been sleeping....

They even notified the Nuclear Regulatory Commission, but nothing changed. So the guard decided to use his cell phone and camera to get evidence.

They videotaped napping in March