(Reuters) – An offensive by insurgents that threatens to dismember Iraq seemed to slow on Saturday after days of lightning advances as government forces regained some territory in counter-attacks, easing pressure on the Shi’ite-led government in Baghdad. As Iraqi officials spoke of wresting back the initiative against Sunni militants, neighboring Shi’ite Iran held out the prospect of working with its longtime U.S. arch-enemy to help restore security in Iraq. U.S. President Barack Obama said on Friday he was reviewing military options, short […]