Signs warning of the danger of trespassing throughout East Miramar aboard Marine Corps Air Station Miramar, Calif., have been torn down, destroyed and stolen, leading to public safety risks. Trespassers aboard the military installation are putting themselves at risk of gunfire and explosive ordnance detonation as well as the destruction of endangered plant and animal habitats. Trespassers also risk interfering with the final clean-up process of polychlorinated biphenyls, a cancer causing chemical agent, also known as PCB, created after the destruction of a transformer during previous years’ wild fires. Increased encroachment and vandalism to historical sites on East Miramar have led to increased random police patrols in the area.