U.S. Deputy Secretary of Defense Ashton Carter speaks with military members during an “All Call” at Joint Base Charleston – Air Base, S.C. June 18, 2012, held to thank the troops for their service. Carter and Lindsey Graham also visited The Space and Naval Warfare Systems Command and Army Strategic Logistics Activity – Charleston at JB Charleston – Weapons Station. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)

U.S. Deputy Secretary of Defense Ashton Carter speaks with military members during an “All Call” at Joint Base Charleston – Air Base, S.C. June 18, 2012, held to thank the troops for their service. Carter and Lindsey Graham also visited The Space and Naval Warfare Systems Command and Army Strategic Logistics Activity – Charleston at JB Charleston – Weapons Station. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)

U.S. Deputy Secretary of Defense Ashton Carter speaks with military members during an “All Call” at Joint Base Charleston – Air Base, S.C. June 18, 2012, held to thank the troops for their service. Carter and Lindsey Graham also visited The Space and Naval Warfare Systems Command and Army Strategic Logistics Activity – Charleston at JB Charleston – Weapons Station. (U.S. Air Force photo/Airman 1st Class Tom Brading)

U.S. Deputy Secretary of Defense Ashton Carter and South Carolina Senator Lindsey Graham speak with military members during an “All Call” at Joint Base Charleston – Air Base, S.C. June 18, 2012, held to thank the troops for their service. Carter and Lindsey Graham also visited The Space and Naval Warfare Systems Command and Army Strategic Logistics Activity – Charleston at JB Charleston – Weapons Station. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)

U.S. Senator Lindsey Graham, from South Carolina, speaks with military members during an “All Call” at Joint Base Charleston – Air Base, S.C. June 18, 2012, held to thank the troops for their service. Carter and Lindsey Graham also visited The Space and Naval Warfare Systems Command and Army Strategic Logistics Activity – Charleston at JB Charleston – Weapons Station. (U.S. Air Force photo/Airman 1st Class Ashlee Galloway)