Moffett Field Hanger 1 stands at Moffett Field in Mountain V

UNITED STATES - DECEMBER 21: Moffett Field Hanger 1 stands at Moffett Field in Mountain View, California, on Friday, Dec. 21, 2007. Navy veterans are fighting their former employer to preserve one of the oldest symbols of technology in California's Silicon Valley. Moffett Field's Hangar 1 was built in 1932 to house the USS Macon, a helium-filled airship slightly smaller than the Hindenburg, that crashed in 1935. The hangar, 198 feet high and big enough to hold 10 American football fields, is a familiar sight on Highway 101 that runs through Silicon Valley. The building is leaking carcinogens and may be too expensive to save. (Photo by Erin Lubin/Bloomberg via Getty Images)