NPR's Melissa Block talks with Ed McDonald, director of exhibit projects at the Chicago Museum of Science and Industry, about moving a 252-foot long, 700-ton German submarine to its new home in an underground exhibit hall. The U-505 submarine was captured during World War II off the coast of Africa and has for years been resting outside the museum. McDonald describes how they will move the boat to its new home 1,000 feet away and 42 feet below ground.
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