Today they had a practice evacuation from four big buildings in downtown Chicago. As near as I could tell it was just an excuse for people to dress casually and leave work early. They walked in a rather leisurely fashion from the huge buildings to a place across the river where some tents had been sent up a few blocks away. Meanwhile two helicopters flew overhead for at least an hour, making a whole lot of noise and generally annoying everyone else who was trying to get some work done.
This drill lacked several crucial things: there was no panic,
there were no wounded, no buildings were on fire, and I didn't see
anyone running through the streets carrying shoulder mounted rocket
I think only thing resembling a REAL evacuation today in downtown Chicago got flushed down the toilet.