SUMMIT HANDSHAKE U.S. Deputy Defense Secretary Bob Work, center, shakes hands with the Niger's President Mahamadou Issoufou in Washington, D.C., Aug. 7, 2014. The two met during the 2014 U.S.-Africa Leaders Summit. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 631940-A-OJG12-017.jpg Photo Gallery