With the Strait of Hormuz still closed and gas prices skyrocketing to the highest in four years, Mary Bruce reports as the Trump administration insists the ceasefire is holding though Iran fired missiles on U.S. Navy ships; Victor Oquendo has new details on the deadly outbreak aboard a luxury cruise ship that health officials now say may be linked to a rare strain of hantavirus; Trevor Ault has the latest on the possible grizzly bear attack that left two hikers mauled and screaming for help at Yellowstone National Park; and more on tonight’s broadcast of World News Tonight with David Muir.

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