The U.S. is pulling out of several key bases in Iraq amid heightened tensions in the region. Two Americans and one Briton were killed and over a dozen others injured in a rocket attack on the Taji military base near Baghdad last week. The U.S. responded by launching retaliatory airstrikes against Iranian-backed militia sites, and on Saturday, rockets struck a base housing U.S. troops. Secretary of State Mike Pompeo warned Monday the U.S. would take self-defensive action if attacked.