'Muslim leaders have reportedly issued a fatwa condemning Britons who fight for extremists in Iraq and Syria. The fatwa, which The Sunday Times newspaper said had been issued by imams, is the strongest denunciation yet by the Muslim community of UK citizens who join militants of the self-proclaimed Islamic State, formerly known as ISIL and ISIS. Issued by a learned Muslim scholar, a fatwa is an edict that may concern any aspect of Islamic life. Technically it cannot be revoked and dies only with the person it is imposed on. The Sunday Times reported six senior Islamic scholars have endorsed...