And I bet an international treaty would solve ALL of those pesky gun problems...
As a Senator, Obama authored the World Poverty Act which wanted the US to adopt the United Nations Millennium Declaration. This is from the UNMD
To take concerted action to end illicit traffic in small arms and light weapons, especially by making arms transfers more transparent and supporting regional disarmament measures, taking account of all the recommendations of the forthcoming United Nations Conference on Illicit Trade in Small Arms and Light Weapons."