mr. bilton, what was twitter supposed to be? >> guest: oh, that's the billion dollar question. actually, the $25 billion question if you look at the ipo. you know, twitter was something that was different for everyone, you know? this was something that was started by four people that collectively were trying to build something that would, you know, communicate with each other, would connect them to their friends. but they all had different ideas of what it was. it was, the genesis of it, the real moment that it actually started was with who gentlemen, one was jack dorsey, and the other was noah glass, and they were two very close friends, and they worked at a podcasting company in early 2005, 2006. it was in san francisco. and the pod podcasting company was failing, and noah and jack had been out drinking one night, and jack had had this idea that you could build something that would allow you to kind of say what you were doing at a moment in time in a very pithy kind of way, like i'm drinking, or i'm eating, or i'm at the park. and noah glass, his co-founder of this company, h