I was in hospital when this went off, the nurses kept popping into the rooms to watch it all unfolding on my television.

A friend's daughter was working in Kings Cross at that time and I was really worried about her and didn't relax until I discovered that she had missed her normal train, someone was obviously looking out for her that day. The surgeon who had operated on me the previous week came in to see me and said that he had been on tenderhooks about his daughter until she managed to contact him, she was a medical student in Kings Cross.

There have been a number of documentaries about 7/7 during the past week, such horrific scenes.

Obviously this wasn't on the same scale as 9/11 but still horrific.

We were able to watch the memorial service from St Paul's on BBC TV. It was such a moving service, and a wonderful tribute to the brave people who responded and to the Londoners who worked together on that awful day.

I don't remember where I was when I heard about it - probably on the morning news or when I was driving into work. I will never understand how people think that killing innocents is justified.

Sue, as you say, still horrific. My local news station, here in New York City, covered some of the commemorations on your side of the Pond. We have a shared shock and disbelief that anyone would attack huge quantities of innocent people, and in a way that will kill themselves.

This may sound odd but I was proud to be British that day. It was a senseless act of violence, but those living and working in London were magnificent. As a nation we refused to panic. People stopped and helped complete strangers, shops gave out clothes to those caught up in the tragedy who were covered in blood or debris, black cab drivers took people to where they needed to go for free, and when it came to getting home from work, London walked, calmly and coolly either to home or to where they could get public transport or be picked up by someone to get home, and the same the next day. People went to work as usual, they just did it on foot.

The sad thing is that ten years on this sort of atrocity is still happening around the world