The story of Sgt. Chuck Bartles' injury in Iraq begins like many others. The 26-year-old Army reservist was riding down a highway in a Humvee when a roadside bomb rocked his vehicle, spraying shrapnel everywhere. One soldier died. Two were injured. Bartles lost a limb. His right arm was shattered and had to be removed above the elbow. What happened next, however, has not happened in decades, according to the commander of Bartles' unit, the Belton, Mo.-based 418th Civil Affairs Battalion. Bartles was allowed to stay in his job and re-enlist in the Army. Civil affairs soldiers are helping rebuild...