WASHINGTON — Negotiators at the United Nations are working to put final touches on a treaty cracking down on the global, $60 billion business of illicit trading in small arms, a move aimed at curbing violence in some of the most troubled corners of the world. In the United States, gun activists denounce it as an attack on their constitutional right to bear arms. "Without apology, the NRA wants no part of any treaty that infringes on the precious right of lawful... (GunPolicy.org)