Cooper poses for a photograph in his U.S. Army Air Services uniform during World War I (L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University, Provo, UT 84602). (L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University, Provo, UT 84602)
L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University, Provo, UT 84602