I had seen that look before, on the faces of tourists visiting the Texas Book Depository in Dallas where Lee Harvey Oswald took the shots at JFK. I took that tour and met some conspiracy buffs, all of us standing at the gunman’s window and looking down to the spot where the motorcade passed. It’s right there below the window, an easy shot at a slow-moving car. No mystery, just a kid and a rifle and a tragedy. They came looking for dark and terrible revelations and instead found out something even more dark and terrible: that their lives were trite and boring.