A massive nationwide event begins in Pittsburgh...to celebrate America’s 250th birthday.

A massive nationwide event begins in Pittsburgh...to celebrate America’s 250th birthday. The movement Light to Unite is a symbolic call for national unity. Cities, businesses, and citizens across all 50 states are encouraged to ignite a spectacular, collective patriotic display. It's being organized by the National Flag Foundation, headquartered in Pittsburgh. The synchronized display begins in Pittsburgh at 9:00 Saturday night, as the city's iconic bridges and skyline will be lit up in red, white and blue.