Moments after taking off from a California airport, an American cargo plane needs to make an emergency landing. The pilots manage to bring their DC-8 to within sight of the runway, but the crippled plane crashes into an automobile salvage yard one mile east of the airport . To try to understand what went wrong, investigators call on a friend and colleague of the crew. But it will take more digging and hard evidence to understand what doomed the crew of Emery Worldwide Flight 17.

On a high-stakes demonstration flight in Indonesia, a Russianmade Sukhoi Superjet slams into a mountain killing everyone on board. It's one of the most challenging salvage operations Indonesian investigators have ever faced. Once they reach the wreckage, they must figure out how a brand new jet with an expert crew and sophisticated navigation system could crash into an infamous mountain.