I am not an American, lets get that straight right off.
9-11 really doesn't affect us the way it does you. I am from a military family and in 2001 was just out of the army my first time. For the record, the World Trade Center is a legitimate target of war. The corporations in that building decide what governments get toppled, what countries get bombed. I did my time with the UN, largely cleaning up the messes made by the US and European corporations and governments toppling anyone who got in the way of third world resources being exploited for First World profit, not the people whose land is being looted.
We support whoever will back us looting them to the eye teeth. These are not nice people. In a cost cutting measure, the US decided to help set up madrassa, religous schools in Afghanistan run by sword scroll radical islamists to churn out endless disposable drones to fight the godless communists, then when they did drive the Soviets out, we went in thinking somehow the religious fanatics we created and armed, and taught to beat the KGB in the triangle trade of drugs, guns and cash, could now be controlled.
I grew up, like most people my age, seeing airlines hijacked (remember Pan Am?) for political reasons. They get flown to some communist dictatorship and everyone negotiates for return, and much publicity is gained. At the same time, we see groups like the Tamil Tigers boarding a train at one end and killing their way to the other. The point was to make a body count, not a photo op. In Canada, we saw Sikh extremist place a bomb on Air Canada's Flight 182 to London, killing hundreds. Pan Am Flight 103 from Frankfurt to Detroit exploded over Lockerbie in 1988 thanks to Lybian terrorists, so it already happened to you, you just got to forget because the corpses fell on someone else's soil and sea.
Only the US thought the planes could not be a weapon. Only the US thought it couldn't happen here. Shit the US carried out airstrikes on a daily basis in the Middle East since the 1950's, and the dead, maimed, and survivors of those made fertile recruitment ground for terrorist cells. The Gulf War never ended, the period of active air actions and economic blockades enforced by navy and air assest they could never match had been going on as long as anyone could remember. They didn't have Tomcats or Eagles. Shit they didn't even have Migs. What they had were generations of young men trained in schools we had the Saudi's set up and run, funded by drug/gun/money smuggling rings the CIA helped train them to get past the most comprehensive intelligence gathering organization ever built, the KGB.
I was on River Road, about ten minutes from work when the first plane went in. I remeber thinking, shit, they finally did it. I laughed when the second one came in, because the news was still peddling accident. You don't fly into the world trade center by accident. I got home to a phone call from my former Regimental Orderly Room updating my activation report location, confirming my address, and confirming my kit status. Just in case they had to call me up with the first recall activation tier.
For the record, the war against Afghanistan needed to happen. They struck against US cities and caused mass casualties using civilian aircraft. If that would be allowed, what followed would harm the future of world trade and all of our lives. The Taliban needed Afghanistan as a base to overthrow Pakistan and get Medium Range Nuclear weapons. That would be bad. Going after Iraq for the same excuse? A pointless loss of a lot of lives to sooth presidential ego.
I remember 9-11, but not like you do. To you it was a shock and a horror. To me? It was just Monday.