I'm not so sure. It's obvious that who ever designed the bills had prior knowlege of the attacks. They must have been in on every major event for years because if you fold the bills just right you can find all kinds of post event prophesy.
I propose that those of us here at link swarm with money ( count me out most weeks) set aside an hour a day in an attempt to discover earth shattering events that have not yet occurred. Then we can either put out a warning as a group or wait until after the disaster and laugh at the victims.
It would be cool either way.