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Fog surrounds a damaged crane attached to St Georges Wharf Tower after a helicopter reportedly collided with it, in Vauxhall, on January 16, 2013 in London, England.
Fog surrounds a damaged crane attached to St Georges Wharf Tower after a helicopter reportedly collided with it, in Vauxhall, on January 16, 2013 in London, England.

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    Copter crash sparks security fears

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Copter crash sparks security fears

CNN's Nic Robertson discusses security concerns after a helicopter collides with a construction crane atop a building.

Copter crash sparks security fears

CNN's Nic Robertson discusses security concerns after a helicopter collides with a construction crane atop a building.