Overview: 2011/08/08 Headlines: 30 Elite U.S. Troops Killed After Helicopter is Shot Down in Afghanistan; Standard &amp; Poor Downgrades U.S. Credit Rating for First Time Ever; Share of Eligible U.S. Population Holding a Job Hits Lowest Level Since 1983; 45,000 Verizon Union Workers Enter Second Day of Strike; New Orleans Cops Linked to Post-Katrina Killings Guilty of Civil Rights Violations, Not Murder; Saudi Arabia Recalls Ambassador to Syria as Brutal Crackdown Persists; More than 100 Arrested in London’s Second Night of Unrest; U.S. Expands Involvement in Mexican Drug War with CIA, <span class="caps">DEA Intelligence Post; Hundreds of Thousands of Israelis March in Tel Aviv; Texas Gov. Rick Perry Leads Controversial Prayer Rally; Texas Rally Dwarfed by Back-to-School Event; Obama Administration Criticized for Carrying on Controversial Immigration Enforcement Program; Tibet Swears in New Prime Minister; Soldier Convicted in Abu Ghraib Abuse Scandal Released from Prison; Japan Honors Hiroshima Victims amid Ongoing Nuclear Crisis; Republican Senator, Military Spending Opponent Mark Hatfield Dies at 89