Two George Washington Bridge security guards photographed sleeping on the job have been fired, according to the Port Authority of New York and New Jersey. A bicycle tour operator who commutes daily over the bridge from New Jersey to New York snapped photos of the two guards on different occasions, and the photos were published on a New Jersey local news Web site. In one set of photographs by commuter Joey Lepore, taken during a Wednesday rush hour at 7:15 a.m., a guard tilts his head downward and dozes