All right, the sounds you're hearing, we believe, is the shot that you get when tear gas is fired and clearly on the scene on your left that you just saw there, there is tear gas now in the central square of cairo, egypt. this is a situation, just about 90 minutes ago, that has grown to pit pro government forces against antigovernment forces. there are at least thousands scoring off now. to get an accurate figure is impossible simply at the moment. we have correspondents in that square, we have correspondents in the buildings around that square. we have been watching the updates roll in by the...