FULL HOUSE 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 (0.07 MB) Credit: VIRIN: 272925-M-FAY81-056.jpg Photo Gallery