men setting fire to the muslim brotherhood offices in eastern egypt. what do you know about that? >> well, we just got that word in a few minutes ago as well. this is an office of the muslimr political wing, the freedom and justice party attacked by masked men who apparently torched the place. this is another sign that this conflict is escalating, and more tense scenes tonight outside the presidential palace. we have seen a lot of tense nights over the past week and a half, but without question this was the ugliest night. this was the first night where we saw violence between the two sides, the supporters of the president, opponents of the president, they both gathered outside the presidential palace, facing off, right in the middle of the street, first it started with exchanges of insults, and chants. then pockets of clashes, rocks being thrown back and forth, two people killed according to the health minister, dozens injured. and tonight, brooke, we really saw bitterness among the two sides. and it looks like these two sides are digging in, they're defiant, they're determined, and they're not backing down. in the meantime, you have the clock ticking towards this referen