 Today marks 25 years since John F. Kennedy Jr. was killed along with his wife and her sister when the single-engine plane they were in crashed into the Atlantic Ocean. John F. Kennedy Jr. was born two weeks after his father was elected president. He grew up the heir to the Kennedy Camelot. That story ended 25 years ago today when the single-engine plane that he was piloting did not arrive as scheduled in Martha's Vineyard.