I would say the terrorists have succeeded on 9/11. They have caused everyone to become security freaks.
Rightly or wrongly, trust is something no longer given freely. Millions of travellers are put through considerable inconveniences to prevent another hijacking.
As a frequent flier, I find it a huge pain to go through the new security processes. There are certainly valid reasons to have the security processes, and I do endure them with a smile on my face, even if I do feel violated time and time again.
The terrorists have succeeded on a magificent scale. No where else in the animal kingdom can a extremely small group of animals leverage such control and fear over such a large group of a population.
The terrorists have affected our daily lives, our outlook on travel, our freedom to travel, our freedom to vacation, our freedom to privacy.
Osama Bin Laden and his terrorists have definitely won the war on terrorism. Look at the airline industry, our federal and state budgetary crisis. Look at all the attention spent on interior plane security, while other softer targets are neglected.