Horace Wilson and other members of his family in a portrait believed to date to the 1860s. He's the mustachioed fellow standing at top right. Courtesy of Abigail Sanborn hide caption

A recording of Dr. Martin Luther King Jr. delivering this address to the New York State Civil War Centennial Commission in 1962 was recently discovered by the New York State Museum. Courtesy of New York State Education Department hide caption

The Boston Symphony Orchestra was mid-performance when the news of President Kennedy's assassination broke. AP hide caption

Times Square near 42nd Street in New York City, in the 1920s. AP hide caption