Procession kicks off from Boston City Hall Plaza at 9 a.m. and meanders to the Old State House for the annual reading of the U.S. Declaration of 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."

LL Cool J is pulling out of a Fourth of July concert in Philadelphia in solidarity with city workers unionized with District Council 33, who went on strike on Tuesday after the AFSCME union failed to reach a deal with the city.