Western Storms and Devastating Colorado Pileup

Aaron Katersky has the latest on the Nancy Guthrie investigation as authorities reveal DNA evidence recovered from gloves found two miles from her home did not match any samples in the FBI's national database, or any DNA recovered from the house; Jay O'Brien reports on the arrest of an 18-year-old man who ran towards the Capitol building while allegedly wearing a tactical vest and wielding a loaded shotgun; and more on tonight’s broadcast of World News Tonight with David Muir.

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