ARLINGTON, VA - NOVEMBER 11: A member of the military color guard stands at attention before a ceremony where U.S. President Barack Obama will lay a commemorative wreath for Veterans Day at the Tomb of the Unknowns at Arlington National Cemetery on November 11, 2013 in Arlington, Virginia. For Veterans Day, President Obama is paying tribute to military veterans past and present who have served and sacrificed their lives for their country. (Photo by Mark Wilson/Getty Images)