"Do you recall almost 2 years ago, the New York Subways kept
finding bottles of water setting along the walls and no one knew where they came from?"
Yes, I remember that. Some were far into the tunnels and there were maintenance side tunnels or alcoves too. The natural fauna there is the rat. I was wondering about possible plague.
Take a look at my post 1929, for a new thought.
If a bomb went off in the subway tunnel, would the bottles of water spray and hit people.