Col. William Roy pets a military working dog during an operation in Parwan province. Commander of the 86th Infantry Brigade Combat Team Col. William Roy, U.S. Army, out of Jericho, Vt., pets a military working dog during an operation in Parwan province, Afghanistan, on May 11, 2010. U.S. Army soldiers of Alpha Troop, 1st Squadron, 172nd Cavalry Regiment, 86th Infantry Brigade Combat Team visited a remote village in Parwan province to conduct a key leader engagement with village elders. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 156681-N-SXX12-474.jpg Photo Gallery