[from
here]
"What do you mean, 'not running'? Don't tell me someone finally blew the place up with everyone inside?" Jason went on as he entered the stairwell. That would be too much to ask for. Arkham was under the Bat's protection, no matter that half of Gotham's problems would be gone if it and all the inmates were just blown to pieces. But Two-Face seemed certain that the asylum was gone. Good fucking riddance if it were, so long as it hadn't been empty at the time.