OFFICIAL ARRIVAL U.S. Deputy Defense Secretary Ashton B. Carter, left, and U.S. Army Maj. Gen. William Mayville Jr., right, commanding general of Regional Command East and Combined Joint Task Force-1, arrive on Combat Outpost McClain, Afghanistan, Oct. 22, 2012. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 634901-V-GHU05-219.jpg Photo Gallery