Cantor Fitzgerald CEO Howard Lutnick got choked up while discussing the company's 658 employees killed during the 9/11 attacks and his efforts to rebuild after it.

His brother and employees died on Sept. 11 Lutnick's brother, Gary Lutnick, and 658 Cantor Fitzgerald employees were killed in the Sept. 11, 2001, attack on the World Trade Center in New York.