The following is from 9News (Denver).
Largest protest of week marching toward Pepsi Center
As the Rage Against the Machine concert let out at the Denver Coliseum on Wednesday afternoon, an unlicensed parade formed, poised to march toward the Pepsi Center.
The concert let out at 3 p.m., and the parade, led by a group called Iraq Vets Against the War, began their march toward the site of the 2008 Democratic National Convention.
The veterans, who were dressed in uniform, did not have an official permit for the parade.
Before the concert let out, Rage Against the Machines and other bands asked the crowd of 8,000 to be peaceful during the march.
The parade, was preparing to march down Brighton Boulevard, disrupting traffic in both directions. The march forced the closure of all ramps from Interstate 70 to Brighton Boulevard. It was not known how long the ramps would be closed.
The parade is the largest gathering of protestors so far during the DNC, surpassing the roughly 1,000 marchers who participated in Sunday's Re-create 68 march.
At least 100 police officers in riot gear were in the area, along with a police helicopter overhead.
It was not known how long police would allow the march to proceed.