A dangerous new factor in an uneasy moment: Unidentified law enforcement officers

This article has been updated.

After more than a week of unrest, tension in a number of major U.S. cities has eased. The vandalism and looting that had often used large, peaceful protests as cover have faded; the eruption of violence at protests appears to be less common. The Associated Press reports that active-duty members of the military who were moved into Washington to help keep order would be moved back out, though that decision was later reversed.