MILITARY ACHIEVEMENT Defense Secretary Robert M. Gates speaks to more than 1,200 students, faculty, ROTC cadets and civilians about the achievements of the all-volunteer military force and the stresses it faces at Duke University in Durham, N.C., Sept. 29, 2010. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 146580-E-HUL48-786.jpg Photo Gallery