"Arlington National Cemetery became the nation's most hallowed burial ground when a Union officer decided in 1861 that the best place to inter Civil War dead was on the grounds of Confederate Gen. Robert E. Lee's plantation, just across the Potomac River from Washington, D.C.".... ...."Now there is Section 60, the area set aside for servicemen and women who have died serving in Afghanistan and Iraq over the past decade. It's on the outskirts of the cemetery, among tombstones rarely seen by visitors. They lie far from the changing of the guard at the Tomb of the Unknowns, outside of...