Bunker Position
Army Spc. Patrick Dodson provides flight line guard security in Afghanistan’s Nangarhar province, Feb. 20, 2012. On combat deployments, service members may be exposed to toxins, such as those from burn pits. The Defense Department is looking for better ways to track these exposures.

Photo by: Army Sgt. Trey Harvey |  VIRIN: 120220-A-LK610-007.JPG