SAFETY BRIEFING U.S. Army Staff Sgt. Rafael Santana, center, conducts a safety briefing with passengers before a mission on Kandahar Airfield, Afghanistan, Oct. 21, 2013. Santana, a convoy commander, is assigned to the 4th Infantry Division's Company C, Headquarters Battalion. SHARE IMAGE: Download Image: Full Size (0.09 MB) Photo By: VIRIN: 225530-Y-ZJH68-430.jpg Photo Gallery