DENVER – JPMorgan Chase & Co. chief Jamie Dimon headlined the Business School’s 13^{th –} annual Celebration of Success dinner Thursday evening, May 19, where he warned of  economic catastrophe if the U.S. defaulted on its loans, a scenario he predicted would `dwarf’ the collapse of former banking giant Lehman Bros. “Think of Lehman times ten,” he told the packed audience at the Grand Hyatt Denver downtown.  Read more