For Memorial Day, SI senior writer Jon Wertheim tells the long-hidden story of Man Mountain Dean, a prolific pro wrestler and film actor who trained a special unit of immigrant soldiers called 'The Ritchie Boys' to fight in World War II. Think of what it would be like if The Rock showed up at basic training up to be your drill sergeant. More than just teaching them how to fight, Man Mountain Dean made these new Americans feel a part of their new country.

60 Minutes: Ritchie Boys, a secret U.S. WWII unit bolstered by German-born Jews

Uncle Slam's Secret Army by Jon Wertheim