Episode 212

As wildfires in the U.S. and Canada rage out of control, Ginger Zee reports on the millions from the Great Lakes to the Northeast under air quality alerts; Gio Benitez has details on the midair emergency on a United Airlines flight from D.C. to Germany with 230 people on board after the pilot reported an engine failure shortly after takeoff and repeatedly declared mayday; Jon Karl has the latest on the Texas redistricting fight after Texas Gov. Abbott ordered the arrest of any Democratic lawmaker who has left the state to avoid a vote; and more on tonight's broadcast of World News Tonight with David Muir.