Leon Black is the financier behind Apollo Management. The private equity firm made a big bet on Harrah's Entertainment in 2007 - at the top of the bull market. That deal, valued at nearly $31 billion, started to sour as tourism on the Strip faltered. So, what is happening to this major Strip investor? We talk with Bloomberg Magazine Reporter Cristina Alesci about the Wall Street mogul's career and what made him a major investor in Las Vegas.