A former Transportation Security Administration contractor is being charged in Colorado for allegedly injecting malicious code into a government network used for screening airport security workers and others.

The Newark Liberty International Airport guard who was away from his post when a graduate student ducked into a secured area has been notified of his discipline, a Transportation Security Administration official said Thursday.

The man who opened fire at the Pentagon Thursday is part of a growing pattern in the US, according to the Department of Homeland Security Secretary Janet Napolitano. John Patrick Bedell is described as an angry "lone wolf."