1. Where is Amelia Earhart?
  2. What happened to JonBenet Ramsey?
  3. Where is that damn plane?
  4. Where did that plastic doll go that I lost when I was 3 years old?
    Seriously, we turned the house upside down. It's still in our old house. I'm sure of it.
  5. Who shot Kennedy?
    Conspiracy theory? Lone gunman? WHAT?!
  6. Where have all the Cowboys gone?
    Suggested by @Nicholas