Overview: 2012/05/18 Headlines: Documents Reveal New Details in Trayvon Martin Killing; Hundreds Protest Acquittal of Houston Ex-Cop in Assault of Black Teenager; Envoy Tells Israel U.S. Ready for Attack on Iran; U.S. Gives Israel $70 Million Boost for Missile Defense; Israeli Gunfire Wounds 7 Palestinians Near Gaza Border; Egyptian Police Officers Acquitted in Protester Killings; U.S. Lifts Trade Restrictions on Burma; Global Events Mark International Day Against Homophobia and Transphobia; House Anti-Abuse Bill Omits Protections for LGBT, Native American, Immigrant Victims; Report: GOP Super <span class="caps">PAC Planned Ads Tying Obama to Pastor;$