Cassandra came from the future to tell Morningstar that the world would end soon if he didn't do something about it. Morningstar took control of America so he could affect things all over the world. He stopped the end of the world and he thought his job was done but Cassandra came back to tell him he hadn't stopped it, just delayed it. Since then he has put off the end of the world many times but Cassandra keeps coming back to tell him it's still coming.