Photo Credit: Staff Sgt. Thaddius S. Dawkins II, 49th Public Affairs Detachment (Airborne)
FORT BENNING, Ga. -- Army Sgt. 1st Class Vince Castellanos, from the Ranger Training Brigade, climbs an obstacle during the 29th Annual David E. Grange Jr. Best Ranger Competition at Todd Field, April 14, 2012. The obstacle was part of the Ranger First Responder medical lane.