Tonight it's a very special "Watters World" edition of The O'Reilly Factor. We sent Watters on a mission to find out how much Americans really know about our country. He quizzes some folks on the street about past presidents and the history of the United States. Then Watters visits an Earth Day festival in New York City to see what folks know about our planet. And don't miss his trip to Spring Break where he finds out what college students are really learning in school. Don't miss this special edition of The Factor tonight!