SAN FRANCISCO - A Coast Guard helicopter sits outside of Air Station San Francisco's hangar during the air station's 70th anniversary celebration, Wednesday, October 5, 2011. Air Station San Francisco was established in 1941 with missions in search and rescue, law enforcement, port security, and environmental protection in the Bay Area spanning more than 300 miles of coastline, from Fort Bragg to Point Conception. U.S. Coast Guard photo by Lt. Todd Vorenkamp.