Trevor Ault has the latest on the deadly shooting at the largest mosque in San Diego County that left three people dead, including a security guard; Ginger Zee tracks the system that’s forecast to bring powerful tornadoes from Texas to the Great Lakes after a dangerous and violent 24 hours of storms in the Heartland; amid an Ebola outbreak in central and eastern Africa, Steve Osunsami has details on the American physician in the Democratic Republic of Congo who contracted the disease, according to the Serge International Missionary Organization, and his wife who was exposed but is showing no symptoms; and more on tonight’s broadcast of World News Tonight with David Muir.

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