David Muir gives a behind the scenes look at the person who takes World News Tonight on and off the air every night – stage manager Michele Mayer. Charlie Gibson, Diane Sawyer and David share farewell messages ahead of her return to Kentucky. https://abcnews.go.com/ | ABC World News Tonight with David Muir

TUESDAY NIGHT: David Muir anchors a special edition of ABC World News Tonight with David Muir as Iran launches an attack on U.S. military facilities in Iraq after a U.S. drone killed Qassem Soleimani, with Ian Pannell reporting from Erbil on the latest details, Martha Raddatz in Tehran where Iranians were vowing revenge and Jonathan Karl at the White House where President Trump is being briefed.https://abcn.ws/2QOryIY | ABC World News Tonight with David Muir