A tug boat moves into position behind a Hapag-Lloyd AG container ship at the Port of Los Angeles in Los Angeles, California, U.S., on Thursday, May 23, 2013. Maersk Line, which controls about 15 percent of global seaborne capacity, reduced its 2014 forecast for global container shipping demand growth to two percent from four percent in a report last week. Photographer: Tim Rue/Bloomberg via Getty Images