Overview: 2012/08/17 Headlines: Britain Vows to Deny Assange Safe Passage; At Least 70 Killed in Wave of Iraq Violence; Afghanistan Helicopter Crash Kills 11, Including 7 U.S. Soldiers; U.N. to End Monitoring in Syria, Saying Both Sides Have "Chosen Path of War"; Report: Assad’s Brother Maimed in Damascus Attack; South African Police Open Fire on Striking Miners, Killing At Least 30; Shell Blamed for New Oil Spill in Southern Nigeria; U.S. Calls on Bahrain to Vacate Charges Against Human Rights Activist Nabeel Rajab; Romney Says Tax Rate Was At Least 13 Percent over Past Decade; Study: 26 Companies Paid More to Execs Than in Federal Taxes; Report: July Marked 329th Consecutive Month with Above-Average Global Temperature; Dallas OKs Pesticide Spraying to Curb West Nile Outbreak; Chevron Sued over Massive Fire at California Refinery;$