Our deepest sympathies and heartfelt prayers go out to the victims of the blasts on London public transport earlier today. We're putting together some resources so that you can keep track of what is going on, both from first-hand survivor accounts, photos by people nearby, and world reaction to these terrible events.
Here are some good starting points to get information:
A search for "london" gives good overall information.
Also, "bombs" is currently giving good results, including world reaction.
More to come soon, including some suggested tags for survivors and first-hand reports who are reporting on events on this sad day.