GUEST OF HONOR Defense Secretary Robert M. Gates, left, talks with Frank Buckles, 107, one of the last known living World War I veterans during a Pentagon ceremony March 6, 2008. Buckles was honored during the ceremony, which included unveiling an exhibit of veterans' portraits by photographer David DeJonge. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 964777-E-YLJ52-006.jpg Photo Gallery