On July 4th, the USA celebrate the "Decalaration of Independence", a document written on July 4th 1776 that explains the "Resolution of Independence" approved by the Second Continental Congress on July 2nd 1776 which legally separated the USA from Great Britain. Even though in legal terms, the separation occured on July 2nd, US americans celebrate Independence Day two days later.
I watched a race of the ChampBoat series in Pittsburgh, listened to a concert by Soul Asylum and watched the fireworks "Flashes of Freedom". However, the battery of my camera went flat after the race. Some nice pictures were taken by other people, have a look here .
The f1 powerboat race was won by Shaun Torrente (in the red boat). Congratulations!