Simmer only here - with one hour experience in a light a/c.
(Although would like to change this in the future.....)
Personally there is no chance that 9/11 was aided by computer flight simulations.
Not in terms of navigation - which was visual anyway - or in control.
I really think that we are being hysterical - if there is another terrorist attack - it will be carried out in another way. Who even says it has to be aviation related ?