Get an email as soon as our next Visual Investigation is published: https://nyti.ms/3xhj7dE

Armed groups showed up to scores of racial justice protests since May. Our video shows how police officers at times let them operate freely.

Subscribe: http://bit.ly/U8Ys7n
More from The New York Times Video: http://nytimes.com/video
----------
Whether it's reporting on conflicts abroad and political divisions at home, or covering the latest style trends and scientific developments, New York Times video journalists provide a revealing and unforgettable view of the world. It's all the news that's fit to watch.