 Charlie realized Hiro lied to her (he had told her his mission was to save her life) and went back to the U.S. because she believed saving the world was a more important destiny for Hiro than saving just her.In "Fallout", Hiro and Ando find their way to Claire's high school, but arrive after Sylar's attack and believe her to have already been killed.Ando tries to be optimistic about the situation, claiming that "save the cheerleader, save the world," is just a progression of events — save the cheerleader "and then" save the world — and not a conditional statement.