Army 1st Lt. David A. Johnson died January 25, 2012 Serving During Operation Enduring Freedomassigned to 5th Battalion, 20th Infantry Regimentt, 3rd Stryker Brigade Combat Team, 2nd Infantry Division, Joint Base Lewis-McChord, Wash.; died Jan. 25 in Kandahar province, Afghanistan, of injuries caused by an improvised explosive device while conducting a dismounted patrol.