Sponsor Golden Gate National Recreation Area, National Park Service Brian O'Neill - Superintendent Project Manager Will Elder - National Park Service Ranger; Media Coordinator Image Sources U.S. Library of Congress, Prints and Photographs Division, Theodore Horydczak Collection San Francisco History Center, San Francisco Public Library National Park Service Golden Gate NRA Collection National Archives and Records Administration Craig Hegdahl - Coastal Defense Study Group Member John Martini - Presidio Military Curator ( retired); Coastal Defense Study Group Member Rod Crossley Collection Kenneth Cooper Jr. Collection Andel Island State Park Web Page Research and Writing Eric Heinz - Volunteer In Park; Coastal Defense Study Group Representative Scott DenHerder - Media Intern James Osborne - National Park Service Ranger; Battery Chamberlin Coordinator Steve Haller - Golden Gate NRA Park Historian Will Elder - National Park Service Ranger Web Page Production Richard Cartwright - Volunteer In Park Gene Dyer - Volunteer In Park Scott DenHerder - Volunteer In Park Will Elder - National Park Service Ranger