Web Extra! Read the article comments.You cannot legally buy a handgun in Chicago, yet the city is the nation’s most murderous city. You can own one, but only if you’ve owned it since before 1982, and it’s registered every year with the Chicago Police Department. Gun-control advocates and gun-rights advocates don’t – or can’t – agree on how a city with a handgun ban can lead the nation in murders. To proponents of owning guns, it means the ban doesn’t work.