Professor Buzzkill: History 101

The "proximity fuse" was a technological marvel of its time. Produced under enormous time pressure and urgency to save lives, it is often called one of the three most important technological advances that helped win World War II. Award-winning author Jamie Holmes talks to us about it and his new book, 12 Seconds of Silence: How a Team of Inventory, Tinkerers, and Spies Took Down a Nazi Superweapon.