The next time you're in Vegas, rent a car and spend a day at the Hoover Dam. This towering, larger-than-life marvel of human engineering has fundamentally shaped the United States. But building it was far from easy. In the first part of this two-part series, Ben, Noel and Max recount the guys' adventure exploring the Dam in person... and the sheer, ridiculous audacity of the thing.

CLASSIC: When West Virginia Begged the USSR for Foreign Aid
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Knitting as Espionage, Part Two: Legendary Spies -- and One Traitor
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Knitting as Espionage, Part One: Secrets in the Stitch
33:37