Deadly tour crash near Yellowstone kills seven, two hospitalized; FAA, NTSB investigate after two jets abort landings at Reagan National; Ruth Buzzi dies at 88; best known for role in "Laugh-In."

Senior White House Correspondent Selina Wang reports on President Trump facing questions about upholding the Constitution; Correspondent Alex Presha has the latest on the dozens of people rescued after a yacht sinks off the coast of Miami; Correspondent Morgan Norwood reports on the multiple arrests in Brazil where police say they disrupted a plot targeting a Lady Gaga concert; and more on ABC World News Tonight.