I was 8, I remember it like yesterday. I was in school, and all of a sudden a teacher came bursting in, and let everyone know about the news. We still stayed in school (UK, so there was no need to go home to be secure) and when the school day finished, my dad picked me and my brother up and drove us home, and it was all over the radio. I didn't fully understand what was happening since I was so young, but it hit me a few years after how serious it was.