Which one of you did this?

https://www.cbsnews.com/live-updates/florida-building-collapse-surfside/

How does this happen with modern engineering standards? Or what is the most likely cause of failure? I have heard and seen Chinese apartment condos falling down because of the substandard materials and standards used but in the US? It is not at all common.

This error in engineering will likely cause more harm than the FIU pedestrian bridge collapse in 2018.