0 >> i think so. the one important thing that came out today was the absence of his finger pripts or dna on the weapon, which raises the question of whether trayvon martin even knew that george zimmerman had a gun. >> all right. thank you so much. that's it for "the lead." 4 . thank you, jake. the first democratically elected president in that country has just been ousted. we're also taking a much closer look at the critical implications for the united states. plus the prosecution nears the end right now, presenting what's been a very controversial case in the george zimmerman murder trial. our legal team is standing by. we'll break down all the testimony. that's coming up today as well. i'm wolf blitzer, you're in "the situation room." huge breaking news, historic news out of the egypt, a military coup in egypt ousting president morsi, just a year after he became the country's first democratically elected leader. troops are in control of key points in cairo, pandemonium in tahrir square, where opponents of the islamic leader, they are celebrating big time. look at the reaction when they first got word. there's also those simmering, anger among morsi's many supporters. they are also out on the streets. posts meantime urge egyptians not on to accept the coup and avoid shedding blood. let's begin our coverage with ivan watson. what a day, ivan. set the scene. >> reporter: well, it was about two hours ago that the top egyptian military commander went on the air and made this announcement that the constitution would be suspended, and basically the most senior judge in the country would be declared interim president. that's when the crowd here just exploded, and the party has been going on ever since. what was really remarkable is you look out across cairo, and in other neighbors, the fireworks are still going on. 23409 just here in tahrir square, as military helicopters periodically circle overhead. that just revs up the crowd even more. this coming after several days of rival protests between supporters of now i guess the deposed and first elected egyptian president mohammed morsi, and then his points. some of those activists, militants clashed. at least 18 people were killed here in cairo last night alone. i watched as ejepgs shoulders, police were deployed. what was also remarkable is they weren't doing it around they andy-morsist protesters. supporter of mo hamed morsi. the muslim brotherhood is slamming this, calling this a full-fledged military coup. mohamed on his facebook page has urged civilians and military to abide by the constitution. the muslim brotherhood is also claiming that at least three pro-muslim brotherhood tv stations have effectively been shut down within the last couple hours. the muslim brotherhood is calling this a coup, wolf. the people in the square here, the people we have seen demonstrating in support of this overthrow of the first democratically elected president, they're saying that all the military is doing is reflecting the will of the people to push out this president, mohamed morist illustrates does it look lie the crowd behind you, the overthrow of morsi crowd, shall we call it, that it's thinning out now that it's getting closer to midnight? or are the folks still there? >> reporter: they're kind of still pouring in and leaving. it is pretty remarkable in comparison to other gatherings that we have seen here in tahrir square over the course of the last two years, real political convulsions here. it is massive and the people are really out. what is of real concern is what may happen between the soldiers, the police in the streets and the mohamed morsi supporters, who i spoke to a few hours ago, and who swore they will not leave. they will die for morsi, see him as legitimately elected is that, so you have incredible polarization here, and also very clear that the military is very much on the side of the anti-morsi people here. they are not objective in this case. one final point i think that's interesting. is when the senior egyptian military commander made his 'nouncement, he tried to clearly make a point to have a diverse crowd around him, including the most senior christian and muslim clerics, as well as one of the if liberal voices, mohammed elbaradei, he called this a correction of the egyptian revoluti revolution. wolf? >> ivan stand by. i know there's happy people in the square, but also shock and anger from some of the follow ers some are now warning of violence. let's brick in ben wedeman. he's not far away from the pro-morsi crowd. >> reporter: right now we have one angry speech after another, that it was a coup that ousted the first democratically elected president. we heard people jeering and booing, and whistling in anger when the announcement was made that mohamed morsi had been dismissed as president of egypt. we know there's a military building just up the road from here, and apparently some of the supporters went and started to shake the gates of that building. soldiers who are guarding that building came out and fired warning shots in the air. now, it does appear at this point that more people are leaving this rally than are coming in at the moment, though muslim brotherhood officials are telling us this will be an open-ended protest against what they see as a protest against the military coup. i spoke to a senior of the brotherhood, and he said people in this crowd are willing to die from stopping this from happening, but it's happened. their president, mohamed morsi is no longer the president of egypt. wolf? let's hope it stays relatively peaceful. no violence, no bloodshed, though a lot of people are fearing for the worst. we'll get back to you, ben. the ouster poses a sharp dilemma for president obama in his administration. the president has been huddling with top advisers, including the military brass, intelligence chiefs, all of the senior national security advisers. let's go to the white house the our correspondent dan lothian has the latest. these are tough decisions that the president will have to make now, dan. >> reporter: you're right, wolf, very tough decisions. remember just back in 2011, this was an administration that had pushed to have hosni mubarak step aside so you could have these free democratic elections happening there in egypt. now this dramatic turn of events in egypt. as you pointed out, president obama back from africa has been getting briefed all day by his national security team. late this afternoon we sudden a parade of top administration officials coming here to the white house. chuck hagel, the defense secretary, john brennan, the cia director, attorney general eric holder, and others coming here to the white house. we have not seen them depart, so all indications are they are still here meeting with the president. the hope had been by this administration that perhaps there could have been a smooth political transition in egypt, that perhaps pressure on morsi would have led to some early elections, but that again did not happen. now we're waiting for official reaction from the white house, wolf. >> any indication there will be a briefing, a statement from the president or someone else, his national security adviser susan rice? the secretary of state john kerry? secretary of defense? any indication any of them are about to explain the u.s. position to the american public? we were we have asked that very question and so far we've not been told that in fact we would get someone on camera tonight, but we expect there will be some reaction from the white house at some point in evening. you know, one of the key questions that we will be listening for is how the white house will define what happened in egypt. if in fact it is a coup, will that impact the amount of aid that the u.s. gives to egypt in the amount of more than $1.5 billion. >> yeah, that's a lot of money at stake right now. a lot depends on how the obama administration defines what has happened over the past few hours. if they call it a coup, that potentially could be suspending all u.s. military and economic assistance to egypt, totaling about $1.5 billion a year. if you get word of our official statement, whether before cameras, or a written statement from the white house or state department, let us know. our viewers are anxious to get that. up next, the coup in egypt means a foreign policy headache for president obama, a significant one. we've been talking about the military may feel some pain. we'll have details on that. also a very different story. we anticipate some gripping testimony in the george zimmerman trial today. how much did the defendant know about florida's stand your ground law? stay with us. lots happening today right here in "the situation room." dad. how did you get here?