There are a number of sources of information about the terrorist attacks in London earlier today. Web sources do not tend to be as up-to-date as the TV and radio, but if you are at work or not near a TV, it may be your best bet. Sky News has a good selection of stuff on the web, including this summary of public transport and traffic conditions. My first checkpoint at work was Google News UK, and although it was a little slow getting the news at first, there is a lot there now. I see from the Guardian that the US has raised the HSA threat level to orange. (It is my perception, by the way, that the British take this sort of thing in stride a lot better than Americans; there is a remarkable air of sang-froid and getting on with it, and not letting the terrorists win by shutting everything down and going into full panic mode.) The Guardian also has a story about the possible perpetrators, and the level of planning that would have been required for this type of attack. The choice of time for the offensive is chillingly brilliant strategy, with the mayor of London, Ken Livingstone, in Singapore for the IOC meeting, and much of the nation's security force focused on Gleneagles and the G8 Summit.