The FBI has sent a notice to law enforcement warning of possible Al-Qaeda threats against shopping malls in Los Angeles and Chicago this holiday season, but quickly followed up to say there is no credible evidence of a threat and that the notice was meant to build "situational awareness." Mayor Villaraigosa, Chief Bratton and other city officials will meet the press (probably to downplay the report but encourage vigilance) at 4 pm in the third-floor conference room at City Hall.