A crane collapse at a high-rise construction project in March 2008 left seven dead on a Saint Patrick's Day holiday weekend in Manhattan. An investigation reveals how a shortcut used while raising the crane left the machine swaying in the wind without proper lateral support.

An aging dam in Nebraska is overcome by flooding after the area is hit with a devastating bomb cyclone; an investigation reveals that massive chunks of ice unleashed by the superstorm played a critical role in the failure of the old structure.