RIGHT FLANK U.S. Army Pfc. Carlos Pena, left, covers the right flank of his unit as UH-60 Black Hawk medical helicopters prepare to land during a training exercise in Kunduz province, Afghanistan, July 2, 2013. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 870217-L-EWC35-813.jpg Photo Gallery