>> ben, can you tell us what they're saying? what you're hearing from the crowd? >> reporter: you know, it's so loud, i can barely hear myself think in these situations. so, i tell you, i cannot tell you. but, i mean, just the emotion in the voices tells you just about everything you want to know. it sort of transcends translation in this case. seeing more and more people, heading in the direction of tahrir square. i think everybody is in shock in a sense. 17 days is not a long time when it comes to bringing down a regime that, in fact, has been in power since july of 1952, when the egyptian monarchy was overthrown. this is something probably no egyptian alive could have ever have imagined would happen so quickly, so dramatically, and,