In the event that terrorists attacked a football stadium packed with fans some fall Sunday, the National Football League would be immune from suit. The Department of Homeland Security recently bestowed upon the NFL and other organizations full exemption under a law called the SAFETY Act (Support Anti-terrorism by Fostering Effective Technologies). The law, passed in 2002, was enacted in response to the lawsuits filed after 9/11. At the time, companies were afraid they would be sued if their security measures failed to stop a terrorist attack. Click here for the story, from the USA Today and here for a comment on the Wall Street Journal Law Blog.
Thanks to Tim Weiler for the information.