Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, presents U.S. Army Spc. David R. Reid III with the Purple Heart during a visit to Brooke Army Medical Center in San Antonio, Texas, on Sept. 30, 2010. Reid, a Ranger assigned to the 75th Ranger Regiment, sustained his injuries on Sept. 20 when he stepped on a pressure plate improvised explosive device during combat operations in Afghanistan.