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PMA neither loaded nor unloaded ships over the weekend, leaving yard and gate operations up to individual terminals.
Port congestion is causing layoffs and inability to reach overseas consumers.
Justice Department said sentence is first against an executive in its roll-on/roll-off shipping investigation.
Top executives described initiatives to improve flow of cargo off docks at the nation's two largest ports during the TPM conference in Long Beach.
Vote ended a two-month skirmish over Obama immigration policy and spared agencies like CBP from cutbacks.
Environmental advantages of liquid natural gas remain undisputed despite a lack of profitability, according to the commission.