George F. Green, inventor of the dental drill, is seen here with a great full beard. William J. Hammer Collection, Archives Center, National Museum of American History, Smithsonian Institution.
The George Washington Bridge is a 4,760-foot bridge connecting upper Manhattan’s Washington Heights to New Jersey. Completed and opened to traffic in October 1931, the suspension bridge towers 604 feet over the surface of the Hudson River below. It carries more than 106 million vehicles each year, making it the world's busiest motor vehicle bridge. In 1981, the bridge was designated as a National Historic Civil Engineering Landmark.