Army Maj. Gen. David L. Mann, right, commander of U.S. Army Recruiting Command, uses a cord to connect his hand with the hand of Army Capt. Ivan Castro, a blind runner, while they approach the finish line at the 2011 Army Ten-Miler in Washington, D.C., Oct. 9, 2011. Castro, who continues to serves in active duty despite losing his eyesight, is the only blind officer serving in the U.S. Army Special Forces.