Throughout the 1990s, a private equity firm called the Carlyle Group began purchasing and investing in a multitude of private defense contracting and weapons companies. In the months after 9/11, they made millions as the U.S. prepared for war. Some of Carlyle's most prominent investors and associates included the Saudi royal family, the bin Laden family, and the Bush family. Did they profit off 9/11? And did George W. Bush help cover up for the Saudis?