The Boston Pops Fireworks Spectacular is known as the premier Independence Day celebration in the nation.  Each year, since its inception in 1973, hundreds of thousands of people come from all over the country to the banks of the Charles River to celebrate America’s birthday while another seven million tune in nationally on the CBS Television Network to view the event during a live one-hour primetime special.  Locally, the Boston Pops Fireworks Spectacular is an institution seen on WBZ-TV Channel 4 from 8:00 p.m. to 11:00 p.m.