"Flash Boys" hero IEX will finally launch as a stock exchange on Friday.
Donald Trump suggests that the mother of a Muslim American soldier, who died fighting for his country, was not allowed to speak at the Democrat convention.
Khizr Khan, whose son died in 2004, says Trump should go to Arlington Cemetery and see all faiths, genders and ethnicities.
"Have you even read the United States Constitution?" says Khizr Khan, father of Muslim-American war hero, Humayun S. M. Khan, who was killed on duty in the Middle East.