QuikClot's efficacy has been proved in the crucible of the battlefield in Iraq. Lt. Jerome Taylor, a 29-year-old battalion surgeon with the U.S. Marine Corps, is one of many combat doctors that have used QuikClot to save lives. A case in point: After arriving last March in southern Iraq, Taylor encountered a 20-year-old soldier hit by a piece of shrapnel that had blown through his left shoulder, severing the axillary artery in his armpit before exiting the other side. By the time Taylor reached him, the soldier's wound was soaking through rolls of gauze at the rate of one every three minutes. In a hospital Taylor could have surgically repaired the severed vessel in time to prevent the guy from bleeding out. That option wasn't available. "When reinforcing the pressure dressing didn't work," says Taylor, "I decided to try QuikClot for the first time. I opened the package, warned him he might feel a little heat, then poured the powder into the entrance and exit wounds in a slow, wavelike fashion."