I still think the Martians killed President Kennedy. It makes sense if you think about it: maybe they did possess magic bullets capable of zinging around right angles and defying the laws of physics. And if the shots came from space, that would explain why they couldn’t be traced. Really, it makes perfect sense. I’m writing a book about it. But in the meantime, conspiracy theorists wanting a new spin on the Kennedy assassination can now visit a virtual version of Dealey Plaza in Second Life.