What effect this will have on pilot recruitment and us wannabes is difficult to predict. It could go either way. If you weigh up the advantages and disadvantages though, I think you will see a balance. As an example; there are going to be alot of kids quickly forgetting the idea of becoming a pilot after Tuesdays events and as has already been mentioned, the retirements will still happen.
The world is still going to be dependant on air travel however risky.
We must remember that however much the airlines were involved on Tuesday they were just a tool in the attack and there are still many others ways for terrorists to hit governments. Airlines will be too tougher a target for terrorists to manipulate after Tuesdays events for them to seriously consider them in the same way again.....we hope.
It's a shaky time for all on this planet but the planet will still keep turning regardless. Keep your chin up!
VFE.