WASHINGTON — The U.S. military said on Tuesday it will allow Immigration and Customs Enforcement to detain undocumented migrants at Buckley Space Force Base in Colorado, further widening the Pentagon’s role in President Donald Trump’s undocumented immigration crackdown. The decision comes on top of U.S. military deportation flights of undocumented migrants out of the country and the deployment of just over 1,600 active-duty troops to the U.S. border with Mexico following Trump’s emergency declaration on undocumented immigration last week. The U.S. military’s Northern Command said in a statement it started providing facilities at Buckley to ICE starting on Monday “to