The first bombs in London happened when I was in Tokyo. The webmaster of this site was at King's Cross when one of the bombs went off, and watching his video footage on the BBC website was very strange, given the close ties he and I have.
The second attempt happened when I was in Bangkok heading for the UK, and I watched events unfold on the news channels in my hotel room, another bizarre experience. I arrived in London a few days later and it was still a topic heard everywhere. I had read that the country had changed a lot and this seemed to be the case when I got here- everywhere I went I heard something connected with the bombing.
However, within a very a short time, London has reverted to the city I knew and loved. You can take the Underground without any fear or looks, and people are more concerned about the results of the cricket than they are about potential bombs on the Tube. When I was in Japan and Thailand, I heard a lot on TV about the spirit of London and how the bombs wouldn't affect people's lives, but coming back and seeing how true this is has reminded me of how much I love this city.
A few weeks ago I was thousands of miles away watching a friend's footage of a disaster, yet within no time we were meeting and chatting all night without mentioning it. It hasn't ruined or even affected life seriously here at all.