Two separate shooting sprees in two days have left 17 people dead in the Balkan country where gun violence is rare. Now Serbia’s president wants “practical disarmament” of the country, which has some of the most guns per citizen of any country in the world. Siniša Vuković, a senior lecturer of conflict management and global policy at Johns Hopkins University, tells The Wold’s Carol Hills that implementation of such measures might not be as successful as some might hope.