Federal authorities are urging law enforcement agencies across the country to watch out for signs that extremists might be planning to wreak havoc at the upcoming political conventions -- by blocking roads, shutting down transit systems and even employing what were described as acid-filled eggs. The warning came in a joint FBI-Department of Homeland Security bulletin issued Wednesday. The bulletin specifically warned about a group of anarchists from New York City who could be planning to travel to the convention sites to disrupt the events by blockading bridges. Anarchists "see both parties as the problem," so both conventions are prime...
