There were no atheists here on 9/11 in New York
What is Timmy saying?
a) There were plenty of atheists before 9/11 but when they watched the twin towers go down they suddenly said "damn, I guess God exists after all, and He's a sadistic bastard"
b) "Well, I didn't believe in God before, but now I'm about to die so I'm going to clutch to a straw and hope some supernatural thing is going to save me"
c) "Well, I didn't believe in God before, but I prayed to Him anyway and got out alive, so I guess He helped."
I suspect (a) rarely exists. Contrary to Timmy's belief, nothing creates atheists like a disaster. The usual human reaction from disaster victims is "fuck God - I prayed and He didn't do shit!" Just check the reaction to the Lisbon earthquake.
(b) is just the old "Pascal's Wager": "I'm dead anyway, so prayer can't hurt."
(c) is the Church's favorite: you pray, you get what you want, God gets the credit. You pray, you don't get what you want, it's your own or somebody else's fault. Over 80% of the people in the Twin Towers were probably believers. Some lived; some died. Among the rest, some lived; some died. Same shit, different explanation.