On September 11th, 2001, Cantor Fitzgerald lost 658 employees in the World Trade Center attacks. Twenty-five years later, the firm has turned its worst day into one of Wall Street’s biggest days of giving. In this exclusive look inside Cantor’s New York trading floor, Chairman Brandon Lutnick and Executive Vice Chairman Kyle Lutnick explain how employees now waive a day’s pay for Charity Day, raising a record $15 million last year through the Cantor Fitzgerald Relief Fund and why they’re determined to top it on the 25th anniversary. They talk to Bloomberg's Romaine Bostick.