Stepping down after 37 years at American Express, CEO Ken Chenault was one of just four African-Americans running a Fortune 500 company. A rock star to the green card faithful, Chenault was a preternaturally calm leader during turbulent times for the financial services firm, from the 9/11 attacks in Lower Manhattan to the 2008 recession. He talked with CBS News Special Correspondent James Brown about his tenure, and his future. Air Date: Aug 26, 2018