Associated Press
Los Angeles Mayor Antonio Villaraigosa talks during a news conference on the port strike negotiations at the Port of Los Angeles on Tuesday, Dec. 4, 2012.  Villaraigosa says both sides in a strike at the twin ports of Los Angeles and Long Beach have agreed to federal mediation. The union representing clerical workers says the strike now in its eighth day will continue in the meantime. (AP Photo/Nick Ut)

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