Some Assembly Required

Les Paul electric guitar, Batesville Casket Company, & Burt's Bees lip balm

Ebonite bowling ball factory, Jelly Bellies, & environmentally compliant toilets

Cheddar Cheese Factory, New Balance running shoes & Steinway pianos

Perfect steel knife, John Deere lawnmowers, & the country's oldest chocolate factory in San Francisco

High-tech golf clubs, redesigned BMW diesel engine, & salt mines

Jack Daniels whiskey, cat's eye marbles, & double-hulled Boston Whaler motor boat.

How do you build a semi tractor-trailer capable of pulling up to 80,000 tons and make it fuel efficient? Brian Unger finds out at the Peterbilt factory. Then, he heads to Upper Sandusky, Ohio to make a shotgun that's been around since 1937.