President Trump announced on Friday — during a speech that pandered to special-interest groups and was symbolic of his administration's disdain for multilateral agreements — that the United States would "unsign" the Arms Trade Treaty (ATT), a landmark agreement that regulates the international trade in conventional arms. It took more than five years of negotiations to develop the ATT, and I spent those years as a consultant in the treaty process, working with... (GunPolicy.org)