In 1969 off the California coast, a US Navy crane carefully lowered a massive tubular structure into the waters. It was designed for an elite group of divers to spend days or even months at a stretch living and working on the ocean floor. Sealab tells the little-known story of the daring program that tested the limits of human endurance and revolutionized undersea exploration.Welcome to PBS America, a channel curated for an international audience from America's Public Broadcasting Service, PBS. This is a factual focussed channel including award-winning American history, current affairs and science.
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