Pitch problems lead to catastrophic impacts that leave little evidence behind. Explore three disasters that left investigators stumped.

A Boeing 707 loses both right engines, an out-of-control aircraft needs managing and a bomb explodes aboard PA 434.

Bad data can be deadly. When a Stealth Bomber crashes at a US Air Force base, it becomes the most expensive aviation disaster ever.

Three harrowing disasters reveal the threat of poor weather to a safe landing, with heavy rain, thunderstorms and treacherous crosswinds.

Situations can turn deadly if training is ignored. Basketball legend Kobe Bryant is among the casualties when a helicopter crashes in LA.

Three catastrophic approaches provoke questions, from a turboprop disaster to an invisible culprit on the Cuban border.