I mean... they basically did. Empire Blue Cross, Blue Shield, Morgan Stanley, Lehmann Bros, New York Stock Exchange, a shit load of insurance and investment firms / hedge funds that weren't particularly well known then but sure as shit were after 2008. In a way it would be kind of interesting to see what the reaction would have been if 9/11 had been in 2009 for example.

(Assuming relatively close timelines, that you actually believe the official narrative etc)