<p>ARLINGTON, VA – AUGUST 01: The gravesite of Muslim-American, U.S. Army Capt. Humayun Khan is shown at Arlington National Cemetary August 1, 2016 in in Arlington, Virginia. Khan was killed during Operation Iraqi Freedom in 2004. Khan’s mother and father, Ghazala and Khizr Khan, were criticized by Republican presidential candidate Donald Trump after their appearance onstage at the Democratic National Convention in Philadelphia last week. (Photo by Mark Wilson/Getty Images)</p>