SAN FRANCISCO -- Master Chief Petty Officer of the Coast Guard Michael Leavitt (second from left) tours U.S. Coast Guard Air Station San Francisco with 11th District Command Master Chief Charles Bushey (left), Commanding Officer of Air Station San Francisco Cmdr. William Sasser (second from right) and Senior Chief Travis Cholewa, (right), July 24, 2012. 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 Petty Officer 1st Class Rachel Polish.