Washington's National Mall has been transformed into a sprawling festival ground for America's 250th anniversary, featuring a miniature Arc de Triomphe, giant tents, temporary pavilions, and a Ferris wheel. The celebrations, organized by the Freedom 250 committee, culminate on July 4 with a major fireworks display expected to draw hundreds of thousands. However, the event has been overshadowed by a heatwave and heightened security measures, with metal barriers surrounding the area.