About 1,600 US veterans have lost major parts of their limbs in the Iraq and Afghanistan wars. About 319 have faced amputations of at least part of an arm. This investigation examines how the military and Veterans Administration have made them a low priority. The story is told through heart-wrenching personal stories from soldiers trying to recover from their battlefield wounds. documents, data, military officials and interviews with top researchers. Experts, Inspector General audits and medical journal studies reveal that developments that have recent improvements prosthetic legs have not happened with arms.