LONG BEACH, N.Y. -- Captain Underpants may be a superhero, but he isn't welcome at one suburban New York school. Three 17-year-old girls were told to leave Long Beach High School when they showed up on the school's Superhero Day dressed as the subject of the bestselling children's books. Captain Underpants is a superhero from popular books that has battled, among other things, talking toilets and the infamous Professor Poopypants. The girls, Chelsea Horowitz, Ashley Imhof and Eliana Levin, wore beige leotards and nude stockings under white briefs and red capes. They were completely covered. Principal Nicholas Restivo said he...