The US has released the leader of an Iranian-backed Shia terror group behind the kidnapping and murder of five US soldiers in Karbala in January 2007.Qais Qazali, the leader of the Asaib al Haq or the League of the Righteous, was set free by the US military and transferred to Iraqi custody in exchange for the release of British hostage Peter Moore, US military officers and intelligence officials told The Long War Journal. The US military directly implicated Qais in the kidnapping and murder of five US soldiers in Karbala in January 2007. “We let a very dangerous man go,...