By QASSIM ABDUL-ZAHRA, LOLITA C. BALDOR, and ROBERT BURNS BAGHDAD (AP) — A U.S. airstrike in Syria targeted facilities belonging to a powerful Iranian-backed Iraqi armed group, killing one fighter and wounding several others, an Iraqi militia official said Friday, signaling the first military action undertaken by U.S. President Joe Biden. The Pentagon said the strikes were retaliation for a rocket