In the "land of the free" a march protesting against the G20 in Pittsburgh was declared an illegal assmebly after it wasn't given a permit. Protestors have been attacked with pepper spray, rubber bullets, sound weapons and tear gas. There has also been some property damage been committed by demonstrators. Check out the live independant coverage from the G-Infinity website, a media project of Pittsburgh Indymedia
G-Infintiy - http://indypgh.org/g20/
Pittsburgh Indymedia - http://indypgh.org/index.php
A good account of the days action including the use of sound weapons by police can be found below
Further analysis and description can be found below on the World Socialist Website. Apparently the only other place the sound weapons have been deployed is by the U.S. in Iraq! The repression is moving from the the edges of the empire to the centre.
Footage of the sound weapons being deployed