Gun violence has dropped dramatically nationwide over the past two decades, but nearly three-quarters of all homicides are still committed with a firearm, the Justice Department said... The report, by the department’s Bureau of Justice Statistics, painted an encouraging picture of long-term trends at a time of divisive political debate over guns and legislation to regulate them. Firearms-related homicides declined 39 percent between 1993 and 2011, the report said, while nonfatal firearms crimes fell 69 percent during that period. The biggest setback for the White House was the defeat of a compromise measure to expand background checks for firearms purchases....
