The world’s greatest stage magician, David Copperfield, had a long run of 17 TV specials before settling down into his permanent residency at The MGM Grand in Las Vegas, where he still performs 15 shows a week. On one of his long-ago TV specials, he debuted a trick that would become a classic in the world of magic, “The Linking Cards,” created by the cleverest guy in the world, Paul Harris. Enjoy this blast from the past.