Well I have been on a holiday flight since 9/11. Nothing different than before. And with stuff like it happening everyday he prolly ment ppl blowing eachother up, which does happen somewhere almost everyday.
Actually I saw an article a while ago about the WTC, saying that it could be a conspiracy, they let the terrorist do the attack so that they would have a reason to start the war. And I'm not saying that it is true, it could be, but there were a few good points, like they lost contact to those airplanes like 40 minutes before they hit the towers. And normally when losing contact with a big civilian aircraft they send a few fighters to check it out. And don't say that they didn't have time to send the fighters, an F-22 can fly at almost 2.0 mach (= 680 meters/second) Keeping in mind it takes about 10 minutes to get the pilot in the fighter and the fighter into the air, there is about 30 mins left to reach the civilian aircraft. 680 (meters per second) * 60 (seconds in minute) * 30 (~30 minutes time) / 1000 (1000 meters=1 kilometer) and the answer is 1224 km. There must be an airport with F-22s closer than 1000km to the towers.
But then again just one theory among many others, and not too much to do with the original topic, but I must agree, 9/11 wasn't anything compared to stuff like the tsunami, only difference is that it happened in the USA and that makes it so horrible to u. But I gues that ppl in Indonesia don't really care that much.