Title: How fireworks work

" On Saturday night nearly 25000 rounds of pyrotechnics will be gloss over the Charles River. It was promised to be the largest and most complex fourth of July fireworks show yet. Pulling it altogether for the first time this year his Rossi fireworks of Loveland Ohio. They'll create about a third of this year shelves which they will then choreographed for the rest of the fireworks that are imported from China. -- are transported to a special storage facility shortly. And taken a designated route over a week ago before -- stuck in the South Boston waterfront. The fireworks and carefully and loaded and hoisted onto barges. Five truckloads of sanity how to run a lot of supporters as buffers. Earlier this week tug boats arrive until the largest in Boston Harbor. Under the credit drawbridge and NBC in the science. And up to Charles River to launch point between Clarendon and Dartmouth streets. The barges anchored in cabled together to form -- In the dawn hours of Wednesday morning team of ten -- technicians was ferried to the cluster of barges but it'll work for twelve hours a day loading -- to -- And connecting them with five miles yellow wire. The wires connected to a main computer station inside a metal shipping container. About fifty feet from the -- shells brought he says its newest and most sophisticated armor system in the world. That would generate over 4000 firings. At 1030 and that the fourth of showbiz. In all more than 15000 shells will be fired into the air and it will include the largest ever used in Boston. A twelve inch diameter shelled rebel climbed 1500 -- Rusty promises are you surprised shells and it especially for the Boston celebration. And traditional Italian south tally to a 21 minutes ago. There's been planning for months."