In a city known for big bets, the one MGM Resorts and Dubai World made on Las Vegas in 2009 was clearly the biggest. And almost five years after CityCenter, the joint venture's $9 billion, mixed-use district, opened as the largest privately funded development in U.S. history, that bet appears to be paying off. Pictured here, an aerial view of the district's three hotels and 500,000 feet of retail and entertainment space. Posted July 22, 2014