Watch Fourth of July fireworks from the comfort of your own home with a pair of national broadcasts that celebrate USA's independence.

Fourth of July fireworks will return Friday on NBC, PBS and CNN. The networks will air TV specials such as "Macy's 4th of July Fireworks Spectacular."

The Fourth of July has been celebrated across the nation since 1776. But when — and how — did Americans across the country agree to commemorate the holiday with a fireworks celebration?