Khizr Khan, father of fallen soldier Humayun S. M. Khan, holds a copy of the Constitution of United States of America during the Democratic National Convention (DNC) in Philadelphia, Pennsylvania, U.S., on Thursday, July 28, 2016. Division among Democrats has been overcome through speeches from two presidents, another first lady and a vice-president, who raised the stakes for their candidate by warning that her opponent posed an unprecedented threat to American diplomacy. Photographer: Daniel Acker/Bloomberg via Getty Images
