(Now, THAT'S Trivia! #19) Hail To The Chief...

I came across a book at the library called The Essential Book of Presidential Trivia by Noah McCullough (who is supposedly only ten years old) and here's a question from that book's "Ultimate Political Quiz". (This one stuck in my mind because it's kind of a trick question. I like trick questions.)

Q: How many presidents are not buried in the United States?

The answer lies on The Answer Blog.