The United States is about to celebrate its 250th birthday, and to help commemorate the day, revelers throughout the DFW area are looking for the biggest and best fireworks displays. Since July 4th falls on a Saturday this year, it can be a little tricky knowing all the details of where and when it all is. Case in point: Because of the FIFA Fan Fest at Fair Park, the annual Fair Park Fourth has been cancelled. The big show within the city of Dallas is happening at Klyde Warren Park this year.