The U.S. Justice Department on Monday sued Texas over floating barriers installed by the state in the Rio Grande river to block migrants crossing from Mexico. Texas authorities began installing the string of buoys in the middle of the river near Eagle Pass, Texas, last week, part of Texas Republican Governor Greg Abbott's initiative dubbed Operation Lone Star to deter migrants. "We allege that Texas has flouted federal law by installing a barrier in the Rio Grande without obtaining the required federal authorization,"...