Space Launch System Takes Off. 3D Illustration. NASA Images Not Used.
Sen. Mark Begich, center left, and Secretary of Defense Robert M. Gates, center right, listen to a brief on a ground-based interceptor missile silo on Fort Greeley, Alaska, June 1, 2009. Gates is touring missile defense facilities in Alaska. (DoD photo by Master Sgt. Jerry Morrison, U.S. Air Force/Released)