A Crisis That Began With an Image of Police Violence Keeps Providing More

 A protest movement that was ignited by a horrific video of police violence — a white police officer pressing his knee against the neck of George Floyd, a black man, for nearly nine minutes — has now prompted hundreds of other incidents and videos documenting violent tactics by police. In Atlanta, a half-dozen officers have been criminally charged after bystanders tweeted footage of an abrupt attack on two college students sitting in…