Sorry to disappoint, but that's just not true. New York has way too many decades of corruption, union thuggery, organized crime, socialism, gun-grabbing, abortion, nanny-state, intrusive government, support of faggotry and being home to a huge chunk of the depraved and perverted leftists in Big Media to be washed away by 9/11. It could have been a turning point for them. It wasn't.
Although, at the time of 9/11, the city was cleaned up under one former Mayor Rudy.