The U.S. military is significantly expanding its area of operations in Iraq, providing air support, intelligence, and on-the-ground assistance to Iraqi security forces trying to reassert control over Baiji and Anbar – two areas where they have recently suffered major setbacks.In Baiji, insurgents led by the so-called Islamic State (IS) organization have used anti-aircraft weapons to shoot down at least two Iraqi helicopters in recent weeks. Pro-government forces guarding the country’s lar…