Leonard Pitts: George Floyd’s death raises an old question: ‘How long?’
“I know you’re asking today, how long will it take?”
Thus spake Martin Luther King Jr. at the end of the Selma to Montgomery voting rights march. He went on to assure his soul-weary people that the moment of their deliverance was just a little ways down the road.
“However difficult the moment,” he said, “however frustrating the hour, it will
