A DC-9 is just minutes from landing at LAX Airport when it is rocked by a sudden jolt. Within seconds, it crashes to Earth, demolishing a small L.A. community. Soon after, a wrecked private plane is found, leading to an unmistakable conclusion: a midair collision. Follow investigators as they determine what happened in the skies over Cerritos, CA, what caused this disaster, and what can be done to prevent it from happening again.