We sacrificed more lives than were lost in the initial attack. And then there's the financial cost which is astronomical.
We had the chance to stop that attack and fucked up.
And now we've handed over control to the Taliban, the very same "freedom fighters" we helped to create. If you think that's victory then you're mistaken.
Meanwhile the greatest threats to America are from internal terrorists.
Funny, the only talk I remember around then was "bombing them back to the stone age".
We had zero legitimacy in that invasion -- it was a jingoistic angry retaliation with no clear plan on what to do other than "kill terrorists".
Irony alert: we probably created more terrorists than we killed.