By Timour Azhari BAGHDAD (Reuters) – The U.S. expects Iraq’s government to help it identify and disrupt the financing of Iran-backed armed groups in the country after a drone attack by Iraqi militants that killed three U.S. soldiers, a senior U.S. Treasury official said. The Pentagon said the drone strike on a U.S. military outpost near the Jordan-Syria border on Sunday bore the “footprints” of Iraqi armed group Kataib Hezbollah, though a final assessment had not yet been made. Iran-aligned groups have been waging attacks on Israeli and U.S. targets from Lebanon, Yemen, Iraq and Syria since th…