conversation with best selling authors terry mcmillan her new one is "who asked you "mystery masser mikely connelly plus george saunders, author of 10th of december and pulitzer prize winning rick atkinson whose latest on world war ii is "the guns at last light" good books and the news, good and bad because this is "face the nation." captioning sponsored by cbs from cbs news in washington, "face the nation" with bob schieffer. >> schieffer: and good morning again on this last weekend before christmas. well as the controversy over whether the national security agency has gone too far and invaded privacy in its efforts to protect us from terrorist attacks, a panel of experts appointed by the president to study the nsa's programs made 46