Inside the World's Most Advanced Nuclear Submarine 🚢

Mark Hamill provides a fascinating insider look at the USS Seawolf (SSN-21), one of the world's most remarkable structures. Called "the most complex military machine of the 20th Century," the $2.3 billion Seawolf submarine is a prototype for the U.S. Navy's undersea future.

Welcome to Progress -- the home of history's greatest leaps forward. From the seismic invention of the world's first printing press to the great rocket-powered marvels that took us to the stars, we'll be bringing you world-class documentaries celebrating history's greatest inventions and technological breakthroughs.

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