06:16 The collapsed Key Bridge was struck at what was supposed to be its strongest point, according to a structural engineer The cargo boat ploughed into what was supposed to be Key Bridge's strongest structural point - and yet it still completely collapsed on impact - according to an engineer. 'As I understand it right now, the location where the bridge was struck is unique. In that it is the same location where the bridge has to resist the maximum amount of force as it holds up the center...