Army Captain Humayun S. M. Khan had dreams of becoming a military lawyer, but in 2004, he was killed during a suicide attack against the base he was protecting in Iraq. His family is certain that a warning he gave to members of his unit to "hit the dirt" saved countless lives. On Thursday, Khan's parents stood in front of the Democratic National Convention, as "patriotic American Muslims with undivided loyalty to our country." To a standing ovation and sustained cheers, Khan's father, Khizr Khan, shared that "like many immigrants, we came to this country empty-handed.