Alone, the bell is a small gift. But in the context of a global, world-changing moment, it becomes invaluable.

In a global conflict of exploding bombs and shells—tens of millions of them on land, sea, and in the air—setting one off in Hitler's headquarters might seem like the simplest thing in the world. 

Glass and the crew of the USS Enterprise survived Guadalcanal to fight another day—barely.

Hundreds of the ship's crew floated on the Pacific for days. Their location and fate were unknown to the US Navy. 

Nicknamed the “Long Lance” by naval historian Samuel Eliot Morrison, the Japanese Type 93 was the best torpedo of World War II. This gyroscope helped keep it on target.