Ivan, our thoughts and prayers are with you and your fellow countrymen. That sounds trite and cliche, but I mean it wholeheartedly. My family had prayer for all that were hurt or killed in this horrible attack.
I can picture how it is there at the moment...there are probably a lot of people walking. If I was still working in London, I would probably be walking home from my office. Traffic is likely at a standstill, police are probably out, and all there is to do is walk under overcast skies to home.
Tomorrow the hour of revenge will come. For now, it's time for the city to gather its wits.
Regards, Ivan