As we near '9/11' the remembrance of it to commemorate the deaths of all those who lost their lives, is now flooding into the media for us to watch and read about.
Here is such a piece on the BBC web site:
9/11 timeline: The story of the day
I was at home when this happened and actually saw the second plane hit the second WTC tower as it happened on Fox News.
As I watched some of the clips above, I still cannot believe the sheer audacity of it all.
But there again, there was absolutely no security on internal USA flights that we could see, when my wife and I once met our son who flew in from Chicago to meet us in Sarasota, Florida, to spend a few days with us.
We were able to meet him at the steps inside the airport building as he walked from the runway up the stairs into the airport building to meet us at the top of them, and similarly, but in reverse, on his return.
So if you were a terrorist, I guess it didn't take too much working out 'how to do it' really.
The main thing that the US authorities hadn't cottoned on to, IMHO, was that these fanatics had absolutely no trouble committing suicide, whilst they committed their atrocities.