(Video) Witness to Lincoln assassination appears on TV quiz show

On this day in 1865 John Wilkes Booth assassinated Abraham Lincoln--one of the greatest tragedies in American history. And 91 years later, on the TV show I've Got A Secret, the last eyewitness to the shooting at Ford's Theater in Washington, Samuel J. Seymour, told his amazing story.

At first, Seymour explained, he simply thought Booth innocently fell out of a balcony.

One of the show's panelists was Lucille Ball--but she didn't get to query Seymour because his secret had already been exposed.

Think about this amazing fact: This man was old enough to remember the Civil War yet he lived 11 years after the atomic bombs dropped on Japan ended World War II.

Seymour died at that age of 96 two months after he appeared on I've Got A Secret.