Little Billy's kindergarten class was on a field trip to their local police station. While there, they saw pictures tacked to a big bulletin board. The label clearly read, "The 10 Most Wanted." One of the youngsters pointed to a picture and asked if it really was the photo of a wanted person. "Yes," said the policeman, "the detectives want him very badly." So Little Billy asked, "Um, mister, why didn't you keep them when you took their pictures?"