Joy mixed with fear as US forces quit Iraq leaving potential security vacuum

BAGHDAD — Iraqis celebrated the departure of U.S. forces after more than two decades of war on Wednesday, though many feared that any security vacuum could increase the power of Iran-backed militias or provide an opening for the return of Islamic State. The withdrawal of the final troops, mainly from an airbase in Erbil in the semi-autonomous Kurdish region, ended the biggest U.S. war of the century, which brought widespread devastation and chaos from which Iraq has yet to fully emerge. Iran, which has entrenched its influence in Iraq through allied armed groups and is determined to drive all U.S. forces out of the Middle East, views the U.S. pullout as a triumph for its "axis of resistance" of allied armed groups across the region. Iraqi troops paraded in vehicles through the streets of Baghdad and the Shi'ite holy city of Najaf to mark the pullout. The withdrawal "fills our hearts with joy," said Baghdad resident Ahmed Salah, who said he felt reborn at the age of 70. But he also said it was now time for powerful militia groups to surrender their weapons, "and let the government be th