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The Real NYC Underground

Take a look inside the world of the 'sandhogs' who dug the NYC subway.

Learn how firefighter Red Adair put out a huge Sahara Desert gas-well fire.

Mark has his eye on a red metal Sno-Wing sled from the '60s.

Billy hopes for the best when he buys a high-end mountaineering bag.

Billy hopes the $150 he paid for a locked briefcase from the '60s was worth it.