A tomahawk, a hatchet traditionally used by Native Americans as a weapon and utility tool, flies through the air after being thrown as US Marines from 1st Battalion, 8th Marines, Bravo company look on during downtime at a patrol base in the Musa Qala District of Helmand province on February 7, 2011. (DMITRY KOSTYUKOV/AFP/Getty Images)

A US Marine from 1st Battalion, 8th Marines, Bravo company launches an FMG-148 Javelin anti-tank missile at Mirage patrol base, Musa Qala District, Helmand province on February 8, 2011. There are around 140,000 international troops, two-thirds of them from the United States, in Afghanistan fighting the militant Islamist Taliban. AFP PHOTO / DMITRY KOSTYUKOV (Photo credit should read DMITRY KOSTYUKOV/AFP/Getty Images)

A Marine from 1st Battalion, 8th Marines, Bravo company launches an FMG-148 Javelin anti-tank missile at Mirage patrol base, Musa Qala District, Helmand province on February 8, 2011. (DMITRY KOSTYUKOV/AFP/Getty Images)