Throughout the 2000s, Six Flags began to suffer from growing debt and organizational bloat, eventually resorting to selling off assets like its European parks and Worlds of Adventure in 2004. Some of the company's largest investors grew frustrated with Six Flags and demanded change; Daniel Snyder 's Red Zone, LLC successfully gained control of Six Flags' board of directors in 2005 by means of a proxy battle. New management continued to sell off various American amusement park locations throughout 2006-2007, although their cash flow continued to decrease, falling $120 million annually under Red Zone's board. Affected by the 2008 financial crisis and the Great Recession, Six Flags filed for Chapter 11 bankruptcy protection in 2009 but continued to operate the parks as normal.