https://en.wikipedia.org/wiki/Occupy_Wall_Street - roughly 2 months. That was mainly one park in NYC.

Stopping them from taking fuel and supplies to their trucks will help end it. But it still could be weeks. It's hard for any city to take that much disruption for long...

To be clear, I have no idea what the optimum approach is. It's clearly a dangerous situation, and I hope the authorities are using every tool at their disposal to figure out who the bad guys are before really bad things happen.

Thanks for the pointer, AdminiScott.

Cheers,
Scott.