SAN FRANCISCO - Current and former Coast Guard Air Station San Francisco crewmembers along with invited guests look at the historical photo display prior to a ceremony marking the unit's 70th anniversary, Wednesday, Oct. 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 over 300 miles of coastline, from Fort Bragg to Point Conception. U.S. Coast Guard photo by Dan Dewell.