Early in the country’s history, transportation was primarily along rivers and the Great Lakes, then railroads. Goods were exported to Europe. Nowadays, shipping is done in containers that are transferred back and forth from trucks, railroads, and giant ships that travel across the oceans. China is a major trade partner. Map #4 in the worksheet shows the volume of shipments that go through North America’s ports, as well as the highway and railroad networks that serve the ports. Due to increased trade with China and other populous Asian nations, and its proximity to major interstate highways and cross-country rail lines, which city has the busiest port in the United States and a dominant shipping/warehousing industry?