A Guy With No Engineering Experience Invented A Wheelchair That Can Go Anywhere, Even Through Water

Brad Soden makes go-anywhere, do-anything wheelchairs under the well-chosen company name of Tankchair, and we learned all about his business in this excellent write-up on Bloomberg Businessweek. Tankchairs sit on treads, enabling them to cross all kinds of terrain that would leave a conventional wheelchair stuck and useless. They can travel up to 30 miles per hour, and Soden is happy to customize them however his customers want — he's outfitted them with everything from gun racks to roll cage...