By MILAN SIMONICH, Pittsburgh Post-Gazette

APOLLO, Pa. -- Some American towns seem untouched by war. Others are haunted by it.

The country's all-volunteer Army may keep certain cities insulated from the fighting and death in Iraq and Afghanistan.

KNOX, Pa. -- Spc. Ross McGinnis, a kid who hated school and even got expelled for buying marijuana on campus, did more than turn his life around.

He saved the lives of four fellow soldiers when he used his body to cover a grenade that an Iraqi insurgent threw from a rooftop into an Army Humvee.