The details will take months or even years, but eventually, it will agree with what was figured out within the first day or two.
In that case, a structual failure due to metal fatigue and corrosion caused by the harsh Minnesota weather.
Failure of DOT inspectors to identify the structual problems which caused this specific failure.
Lack of State and Federal funding, to correct the problems which were already identified.
Can I say that I’m amazed at the high level of response from the emegency personnel and nearby citizenry in Minneapolis?... great work!