I've already saved the President's life and then completed many other quests. I go see Col. Moore at the Dam and she tells to take out the Great Kahns, which I do. Then tells me take care of the B.O.S. , which I already did for Mr. House. Moore tells me to see Ranger Jackson about protecting the President, but I completed this already and Jackson just tells me what a great job I did. Moore just keeps telling me to see Jackson. Is there anything I can do or do I just have to start a new character?