No. 10 London
When one thinks of the world's most dangerous cities, it's unlikely that London, England, would be among the first places that come to mind. But for the past several years, the city has been increasingly plagued by knife-related crime and violence. In 2008 alone, 16 teenagers were lost over a period of 6 months to violent knife crime. A seemingly self-perpetuating cycle, studies of young Britons across the city have found that many teenagers feel the need to carry these weapons for their own safety and well being. Like most crime data, the incidence of knife-related violence in London has been disputed and debated by some. That notwithstanding, despite disputed statistics, even conservative estimates show knife-related violence in London occurring at a rate of every 52 minutes.