There have been some pretty epic -- and hilarious -- April Fools' Day pranks over the years. Here's just one example: Taco Bell ran an ad in 1996 saying the company had bought Philadelphia's Liberty Bell and would be renaming it the "Taco Liberty Bell." The White House Press Secretary at the time, not lacking a sense of humor, fielded questions on the matter by saying the Lincoln Memorial had also been sold to Ford Motor Company.