National Geographic pits the best American companies and their prize innovations against each other in the ultimate showdown. Can a brick-wall-busting air cannon penetrate a revolutionary bombproof wall coating? Can an impenetrable safe withstand a beating from a two-story pneumatic jackhammer? Will one of the world's hottest blowtorches outperform a chainsaw capable of chewing through rocks and steel? Hosts Brian Unger and Zane Lamprey learn how the amazing products work from the engineers who created them before the showdown reveals the ultimate winner.
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