President Barack Obama talks with state and local officials upon his arrival at Buckley Air Force Base in Aurora, Colo., July 22, 2012. Pictured, from left, are: Rep. Ed Perlmutter, D-Colo.; Sen. Michael Bennet, D-Colo.; Sen. Mark Udall, D-Colo.; Colorado Gov. John Hickenlooper; Police Chief Dan Oates; and Aurora Mayor Steve Hogan. (Official White House Photo by Pete Souza)