2010/09/20 Headlines: BP Permanently Seals Ruptured Gulf Well; At Least 56 Killed in Iraq Violence; 17 Killed as Afghanistan Holds Elections; NATO Bombing Kills 7 in Afghan Village; Report: US Won't Change Afghan War Policy; Freed Hiker Returns to US, Urges Freeing of 2 Prisoners; Iran Retracts Claim of US Troop Arrests; Poll: Majority Oppose Attack on Iran, Favor Neutrality on Mideast Conflict; Pope Benedict Faces Protests in Britain; Virginia Scheduled to Execute 1st Woman Prisoner in Century; FDA Panel to Advise on Engineered Salmon; FDA Barring Food Makers from Advertising Products as <span class="caps">GMO-Free