IT'S BEEN two weeks since I wrote about Bennett and Vivian Levin. But my mailbox is still bursting with reaction to the couple's generosity toward wounded troops from Walter Reed Army Medical Center and Bethesda Naval Hospital. "I served three tours in Vietnam and can't remember anyone doing anything like this for the injured soldiers, sailors and Marines that came home from the hospital," wrote James L. Wright Jr. "The Levins and others involved in this truly beautiful act of love are loved right back by every one of us who have heard of their selflessness or served in the...