“…it is typical in riots that the great majority of the crowd are onlookers and noise-making supporters; only about 10 percent or less of the persons seen in riot photos are actually doing something violent, engaging the other side. It may well be the case that those who carry the battle are specialists in violence, as Charles Tilly calls them, tough guys, athletes and weapons specialists on either side of the law. (One of those charged at the Capitol was an Olympic gold-medalist swimmer.)”