Friday on the News Hour, the Supreme Court strikes down a ban on bump stocks that allow semi-automatic weapons to fire like machine guns. A Justice Department report finds the Phoenix Police Department routinely discriminated, used excessive force and violated civil rights. Plus, a look at the water shortage gripping Mexico City and failure to supply water to many of its 22 million residents. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders