The MountaintopToday, you must have heard, is the 40th anniversary of civil rights leader Dr. Martin Luther King, Jr.'s assassination. He was shot to death while standing on the balcony of a Memphis hotel at 6:01 p.m. on April 4, 1968. The night before, he had given his last speech—the prophetic "I've been to the Mountaintop" sermon—in which he told the crowd, "Like anybody, I would like to live a long life. Longevity has its place. But I'm not concerned about that now." King was tired, and had to be specially cajoled to go to the church that night; he ended up delivering his own eulogy. Considering the circumstances, it was his most moving speech of all. Were he alive today, King would be nearing his 80th birthday. A full clip of the speech is below. Have we reached the promised land yet?