USA. Fort Jackson, South Carolina. 2011. A drill sergeant watches recruits performing combat lifesaving techniques. Several soldiers mimic brutal injuries, screaming and writhing, a few faintly smirking. The recruits bandage the injured and get them out of the “kill zone” while others provide cover. Their movements are slow and clumsy. A man in a black-billed hat films the action for later review. The instructors shake their heads and frown but say the exercise will run smoothly with more practice. Ultimately, most soldiers injured on the battlefield survive even the most grievous wounds.