Interesting - and for the second time. Looks like a substructure failure - note how the pylon on the left spans shifts and buckles while the deck seems fairly coherent on the way down.
Look at the pylon below the bridge deck near the waterline. Now contrast it's relative size with the piers coming out of the river here. That Ganges bridge is much longer than the Mississippi crossing, yet it's substructure - at face value - doesn't seem proportionally larger.
Shit engineering; shit bridge; big failure.
Shit "people".