Defense Secretary Chuck Hagel walks with Air Force Gen. C. Robert "Bob" Kehler, second from right, commander of U.S. Strategic Command, Navy Vice Adm. Tim Giardina, the command's deputy commander, and Army Command Sgt. Maj. Patrick Z. Alston, the command's senior enlisted leader, on Offutt Air Force Base, Neb., June 20, 2013. Hagel met with senior leaders, received command briefings, and visited with troops and civilians to thank them for their service. DOD photo by Erin A. Kirk-Cuomo Defense Secretary Chuck Hagel walks with Air Force Gen. C. Robert "Bob" Kehler, second from right, commander of U.S. Strategic Command, Navy Vice Adm. Tim Giardina, the command's deputy commander, and Army Command Sgt. Maj. Patrick Z. Alston, the command's senior enlisted leader, on Offutt Air Force Base, Neb., June 20, 2013. Hagel met with senior leaders, received command briefings, and visited with troops and civilians to thank them for their service. DOD photo by Erin A. Kirk-Cuomo SHARE: Download: Full Size (3.75 MB) Credit: VIRIN: 543493-I-OAD11-608.jpg Photo Gallery