>> reporter: the same ten candidates we saw last time around will be on stage with the addition of carly fiorina, who was in the earlier so-called happy hour debate, who's now jumped up to the bigger group. what are they going to have to work with in this contest? they can't bring any phones with them, no tablets, no notes, no props. each candidate will have a pad of paper and a pen and a glass of water. and what will they be facing? well, our panel will be comprised of our moderator, jake tapper, also cnn's dana bash and hugh hewitt from radio. they will be posing questions, along with some confess that will be taken from social media, facebook, instagram, twitter and so forth. the subject matters are going to be foreign policy, domestic policy and politics. big, broad topics. with so many people on stage, they will have narrow windows in which to answer. one minute per answer, 30 seconds if it's a rebuttal to something else that was said about you. and we will use timing lights to