John Wilkes Booth shot Abraham Lincoln. I wouldn't have cared, really,* except I just read Assassination Vacation by Sarah Vowell. You should too. It's really good.
*that's not to say that I don't care that Lincoln was shot. An awful thing, obviously. But my historical fascinations tend to be more European in nature. I am slightly obsessive, though not to the same delightful extent as Sarah Vowell. Well, I suppose I might be if I had the means to travel all over Europe, tracking locations of royal killings (such as that of Mary, Queen of Scots who was unfairly deprived of her throne and beheaded by Elizabeth I of England. Unlike most authors of historical texts on the issue, I am firmly on Mary's side.)