NUCLEAR DETERRENCE Deputy Defense Secretary Bob Work, center, Navy Adm. James A. Winnefeld Jr., right, vice chairman of the Joint Chiefs of Staff, and Deputy Energy Secretary Elizabeth Sherwood-Randall testify on nuclear deterrence before the House Armed Services Committee in Washington, D.C., June 25, 2015. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 699532-R-DPP13-178.jpg Photo Gallery