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Rickmers, which manages the ship for Maersk said Iranian navy fired "warning shots" at Marshall Islands-flagged Maersk Tigris.
Los Angeles Mayor Eric Garcetti's office says there are "plenty of trucks and drivers."
A strike could come as soon as Monday, according to a statement from Teamster affiliate Justice for Port Truck Drivers.
Trade Promotion Authority, a bill that grants the president authority to conclude trade deals without congressional interference, moved forward in the Senate Thursday morning.
Together with Dynamex, the two units will offer final mile delivery in more than 70 markets.
Energy and Water Development Appropriations Bill substantially increases funding to the Army Corps of Engineers for waterway and port infrastructure projects during fiscal year 2016.