U.S. Army Spc. David Walls watches Sergeant Homer, a mine detection dog, as he performs a mine-proofing sweep at the Russian Grain Silo Combat Outpost, Kandahar, Afghanistan, Nov. 17, 2010. The outpost is the intended site of a 10-megawatt power plant that will provide electricity to the western side of Kandahar. Walls and Homer are deployed to Kandahar Airfield, Afghanistan. Walls, a mine detection dog handler, is assigned to the 49th Engineer Detachment.