Los Angeles Mayor Antonio Villaraigosa, left, and police Chief William Bratton, unveil a multi-agency crackdown to curb an upsurge of gang violence in central and South Los Angeles, during a news conference at the LAPD's 77th Street Station on Tuesday, Aug. 25, 2009 in Los Angeles. The initiative will rely on the resources of the Los Angeles Police Department, the FBI, the Bureau of Alcohol, Tobacco, Firearms; the U.S. Marshals Service, and the California Highway Patrol.