Dorothy Oxendine presides over American Gold Star Mothers Inc., a national organization of women whose sons and daughters have died in military service to the nation. (Photo by Mark Abraham) AMERICAN IDENTITY With the Iraq War, a New Generation of Gold Star Mothers BY DELIA M. RIOS More stories by Delia M. Rios WASHINGTON -- As Dorothy Oxendine knows, the most dreaded words a parent can hear are "We regret to inform you ..." She lost her only son, Pfc. Willie F. Oxendine III, to a land mine in Vietnam on May 30, 1968. His death at age 21...