Jeffrey Head, Instrumentation Laboratory supervisor, right, Kevin Jones, Instrumentation Laboratory technician, left, and Richard Thomas, IT, left, go over a MOD-7 instrumentation wafer from a Minuteman III at Vandenberg Air Force Base, Calif., Feb. 3, 2014. The Minuteman IIIs are regularly tested with launches from Vandenberg AFB in order to validate the effectiveness, readiness and accuracy of the weapon system, as well as to support the system's primary purpose - nuclear deterrence. (U.S. Air Force photo by Staff Sgt. Jonathan Snyder/RELEASED)