The last Rhode Island speech by the Rev. Martin Luther King Jr. took place 50 years ago this spring. He spoke at Brown University's Sayles Hall on April 23, 1967, his second Rhode Island appearance in seven months. (He had spoken at the University of Rhode Island's Keaney Gym on Oct. 5, 1966.) In his sermon at Brown, "America's chief moral dilemma," King spoke against poverty, racial inequality and the Vietnam War. "Peace and civil right movements, while [...]