This primary source comes from the Records of the Army Air Forces, ca. 1902 - 1964.
Full Citation: Photograph 18-AA-15-5; Angel Island; 2/12/1951; California - Angle Island through Arrowhead Lake; "Airscapes" of American and Foreign Areas, 1917 - 1964; Records of the Army Air Forces, ca. 1902 - 1964, Record Group 18; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/angel-island, January 18, 2025]