I was eleven years old and I remember I heard some rumors of a plane crash on Manhattan, apparently it rammed one of the skyscrapers. As I said, it was all rumors at that point and I remember how the mothers waiting for their sons, my teammates talked about this.
I didnt understand the gravity of this before a day or two later when I watched it on the news. I mean I saw it on the news the same night, but it was only later on, when the twin towers collapsed and the firemen and rescue workers searched the ruins that I fully understood how severe this was.
It was horrific even for us in Europe. As I said, the ruins and the screams for help from from under the massive ruins is what stuck with me and will continue to do so for the rest of my life.