Brian M. Wolverton, 21
At an early age, Wolverton was a fan of war action video games, such as "Call of Duty 4" and the Magic fantasy card game, his mother said. But track became the focus of his teen years. Wolverton's unit was in eastern Afghanistan's Kunar province when it was attacked by insurgents. He was killed by indirect fire -- a military term that usually refers to a mortar or rocket attack.
Sources: Times research, Defense Department, iCasualties.org