Balboa Park Electric Building (1915 Exposition's Commerce and Industries Building), now Casa de Balboa, after the 1978 fire caused by arson. The Electric Building housed the Aerospace Museum and contained vintage airplanes, mementos and artifacts. San Diego's contributions to the history of aviation and manned flight, dating from the construction of Charles Lindbergh's Spirit of St. Louis by San Diego's Ryan Aircraft Company, to rocks taken from the surface of the moon were destroyed.