Another day of deep sadness today, this time for London and its people.

It happened about two hours ago, and there's a lot of conflicting reports. The underground network and buses are shutdown, and there isn't much to be found online--bbc.co.uk and sky are timing out for me at the moment, but this BBC URL works.

I remember what I wrote when Madrid happened, and I can't think of much more to add, except to reiterate--how long must we sing this song?