Matt Gutman reports on the tense showdown on the streets of downtown Los Angeles amid chaotic immigration protests and nearly 100 arrests, where there are now more U.S. troops activated, than in Iraq and Syria; Aaron Katersky has chilling new reporting after authorities say they uncovered an alleged plot to target Jewish people in New York City with assault-style rifles; Kayna Whitworth reports on five-time Olympic medalist and former gymnastics star Mary Lou Retton now breaking her silence after being arrested for driving under the influence, telling ABC News she takes "full responsibility" for her actions; and more on tonight’s broadcast of World News Tonight with David Muir.
