For those who were not alive 50 years ago this month when President John F. Kennedy was assassinated, it’s impossible to imagine how the news must have been received by the public. The photographs of that day do a remarkable job of retelling one of the nation’s saddest days in history, but sound brings the news to life in an entirely different way. This audio recording from the Boston Symphony Orchestra needs little more introduction. The symphony’s music director, Erich Leinsdorf, simply told his audience about a news story that was unfolding at that very moment. He starts by saying, “We have a press report over the wires. We hope it is unconfirmed.” You can listen to what happens next.