London has been a terrorist target for a long time -- from the "The Troubles" involving the IRA, to the 7/7 transit-system bombings in 2005.
Because of this notorious past, law enforcement officials in the British capital have taken many steps to ensure the safety of its citizens. There is now a "Ring of Steel" around the center of London, a series of safety measures designed to deter – and prevent – terrorism.
They've caught the eye of New York City Mayor Michael Bloomberg, who visited London today to see what he could learn from this "Ring of Steel" system.
The center of London is watched by one million security cameras, covering virtually every square block...
