You need deep water to float a big boat. That's why Robert Ingalls plunked his 800-acre Ingalls Shipbuilding yard on the banks of the yawning Pascagoula River, where it drains into the Gulf of Mexico, in 1938. The Mississippi facility has since birthed nearly 70 percent of the U.S. Navy's warships. Today, its 11,000 workers cut, weld, and otherwise bang together several Navy craft at a time. Shown here is the future USS Tripoli, an amphibious assault transport whose 855-foot deck is longer than some nations' aircraft carriers. It will be armed with attack helicopters and 1,600 Marines ready for inland strikes—all thanks to Ingalls' orchestrated feats of manufacturing.