Egypt's Black Pyramid at Dahshur is the strange, crumbling pyramid that collapsed before its pharaoh, Amenemhet III, was ever buried here, and today, it's largely unexplored; special access to a hi-tech archaeological investigation reveals what went so catastrophically wrong. Also explored is the Hawara Pyramid, where Amenemhet III was buried.

When the Nazi airship Hindenburg exploded in a giant ball of fire, the world's largest aircraft in history became one of its greatest catastrophes, and now, new technology might finally reveal what caused the fatal crash and if it was an act of sabotage.