DETROIT, MI -Billionaire investor Warren Buffett speaks at an event called, 'Detroit Homecoming' September 18, 2014 in Detroit, Michigan. The purpose of the invitation-only event of Detroit expatriats is to give the group a chance to reconnect, reinvest and reinvent with their hometown. The topic of Buffet's conversation was, 'Why I'm Bullish on Detroit.' (Photo by Bill Pugliano/Getty Images)