Anarchists target political conventions

NEW YORK - AUGUST 29: Alleged anarchists run after starting a fire during a protest march near Madison Square Garden the venue for the Republican National Convention (RNC) August 29, 2004 in New York City. Hundreds of thousands are expected to march during the protest organized by United for Peace and Justice on the eve of the four day Republican National Convention. (Photo by Spencer Platt/Getty Images)

    Just Watched

    Anarchists target political conventions

Officials are on alert as anarchists threaten to shut down both National Conventions. CNN's Jill Dougherty reports.