WWI VETERAN U.S. Army soldiers unveil Frank Buckles' portrait during a Pentagon ceremony, March 6, 2008. Buckles, 107, is one of the last known living World War I veterans. Defense Secretary Robert M. Gates, left, stands beside Buckles. At far right are Secretary of the Army Peter Geren with portrait photographer David DeJonge, who donated a photo exhibit of WWI veterans to the Pentagon. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 091921-Z-OVA43-558.jpg Photo Gallery