The State of Emergency in Missouri, our Leslie Lopez has the details as there are over three hundred rescues in the state; and the threat of revenge by Iran’s new Supreme Leader after his father, the former leader was killed by the United States at the start of the war with Iran, Selina Wang reports;  and a 14 year old’s simple act that made the biggest difference, Rhiannon Ally has the story; and more on tonight’s broadcast of World News Tonight with David Muir.

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