The Newtown shooting in December, which left 20 school children and six teachers dead, has dragged the issue of gun control back into the national agenda. For the first time in years, US politicians are discussing serious gun control measures. But millions of people in the country’s inner cities live with the threat of gun violence on a daily basis. In Baltimore, one of the most dangerous cities in the US, the police have reframed their ‘war on drugs’ as a ‘war on guns’. In the third episode of our special series on guns in the US, Inside Story Americas travels to Baltimore to meet those trying to stop gun crime and others who say owning a gun is sometimes a matter of survival.