Feb. 3 is the 82nd anniversary of the sinking of the USAT Dorchester in the north Atlantic Ocean by a German U-boat.

Midair collisions throughout aviation history have brought some of the worst tragedies in the sky. But they've also left important lessons.

On March 16, 1941 – with European cities ablaze and Jews being herded into ghettos – The New York Times Magazine featured an illustrated story on Adolf Hitler’s retreat in the Berchtesgaden Alps.