From numerous camera angles, what we see here is the collapse of the North Tower of the World Trade Centeron 9/11. You will notice a remnant spire from the structural steel, which remains standing for a few moments after the bulk of the Tower’s collapse.
Then, as if Tinker Bell were hovering over there waving her magic wand, the spire literally turns into Fairy Dust before your eyes. You don’t have to believe me. Just watch it. From several angles.
Source: News To Me