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

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David Muir reports on the biggest headlines across America and around the world, wherever the story goes. Thank you for making “World News Tonight with David Muir” America’s most watched newscast. | ABC World News Tonight with David Muir

With the search for Nancy Guthrie now in its third week, the Guthrie family – including all siblings and spouses – has been "cleared" as suspects in her disappearance, the Pima County sheriff said. Aaron Katersky reports from Tucson as the investigation intensifies. https://abcnews.link/umjhjl7 | ABC World News Tonight with David Muir

After a frantic 24 hours of what appeared to be the first major break in this case of Nancy Guthrie's disappearance, no one is in custody and no suspect has been named. Aaron Katersky has the latest on the man authorities detained and released. https://abcnews.link/fWMbw6m?utm_source=facebook&utm_medium=social&utm_campaign=dhfacebook&utm_content=app.dashsocial.com/abcworldnewstonight/library/media/639652007 | ABC World News Tonight with David Muir