QUOTE : Army studies indicate that if a wounded soldier arrives alive at a combat support hospital where surgeons and nurses can treat him, the chances of his surviving are extremely high—greater than 90 percent. “Surviving,” of course, doesn’t necessarily entail keeping arms or legs or retaining the ability to function independently back home. The leading cause of preventable death on the battlefield is bleeding. Having a leg blown off by an IED, for instance, can be fatal if quick steps are not taken to control the blood loss. Even deadlier is internal bleeding, a problem for which medics generally don’t have a good answer. A soldier who is bleeding internally needs to be evacuated and delivered to a surgeon immediately if he is to have any hope of survival. The second-leading cause of preventable death is something called tension pneumothorax. If a bullet punctures a soldier’s lung, air can leak from that hole into the “pleural space,” or cavity outside the lungs. That air can build up and eventually interfere with the functioning of the heart. This can be a relatively simple problem to correct: a medic can simply stick a big needle in the soldier’s chest to relieve the pressure in the pleural space.