Shocking
I have now watched that video 20 times now, and something doesn't seem right. The nature of it collapsing within seconds doesn't seem right. Even as a suspension bridge, a more likely outcome would seem that this thing would have fallen in segments.
I am not a civil engineer, but outside some serious structural maintenance or design issue, this should have been confined within the piers struck. In most areas of engineering, design and response are governed around doing exercises utilizing risk assessments nd worst case scenarios. Was it underdesigned? Failings in maintenance?
Not trying to stir up conspiracy theories this early on, but something doesn't seem to add up.