The area of interest where the bridge collapse may have started. The tensioning rod being tightened at the time of the collapse is sticking out above the canopy with the tensioning machine still attached to its end.
National Transportation Safety Board
2018-03-17
Screenshot from <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=aeJKqojmHgY">NTSB B-Roll of Miami, FL bridge collapse</a> at 2:53