Pfc. Christopher R. Barton, 22, of Concord, N.C., died May 24 in Khowst province, Afghanistan, of wounds sustained when insurgents attacked his unit using small arms fire. He was assigned to the 1st Squadron, 33rd Cavalry Regiment, 3rd Brigade Combat Team, 101st Airborne Division (Air Assault), Fort Campbell, Ky. to be updated…. <