Embarrassingly, not much. I knew John Wilkes Booth shot and killed President Lincoln at Ford’s Theatre. I knew very little of the larger conspiracy or the aftermath. I’ve talked with a lot of people subsequently and based on my conversations, I’m not alone. This is one of those stories that slipped through the cracks of our history lessons. And it’s such a great story. The country was in a tremendously fragile state—the Civil War had ended only five days earlier, armies were still on the battlefields—and in the midst of this anxiety and chaos the country’s core values and founding principles were being challenged in a very personal way.