The Trouble With Helicopters

Can anyone see the rationale of letting helicopters fly over the centre of a huge metropolis?

Well, I think that after today the powers-that-be might rethink that one.

At 8am, in the middle of the rush hour, a helicopter failed to see a tall crane attached to a tall building-in-progress because of mist, hit it, demolishing the arm, and crashing nearby in a busy street surrounded by railway lines, an underground station, a massive bus station and the MI5 building (that's the secret service). Miraculously only the pilot and one passer-by were killed. And for the first time ever, the crane driver was late for work, and was not in the cabin that was sliced in two.

I found a compilation video to give a flavour of the mayhem.