WASHINGTON, D.C. - With the late afternoon sun glistening off of polished car hoods and new prosthetic limbs, wounded troops recovering at Walter Reed Army Medical Center here gathered to take a peek at a row of NASCAR racecars parked in front of the hospital's Mologne House hotel. The cars were lined up at Walter Reed on Sept. 7 as part of a daylong NASCAR tribute to American service members, many who sacrificed body parts in service to their country. Several NASCAR drivers and executives were on hand to show just how much they appreciated this sacrifice. "They defend everything...