Usually when an alarm goes off . . we take a minute to consider the possibilities so we don’t over react. But what if it comes on the heels on a world altering disaster? Can an entire city have PTSD? That’s what L.A. faced just 2 months after the bombing of Pearl Harbor.

The Backstory: The Horrifying Afterlife of Lincoln's Guests at Ford's Theater
10:11

The Backstory: The Secret NASA Test That Almost Ended the Space Race
08:04

The Backstory: Space Junk Falling From the Sky
08:43