Something that hardly ever happens on chinese soil. In a deal forged by the worlds two largest economies, and its biggest polluters to combat Climate Change, president obama and chinese president xi unveiled an aggressive plan to cut Greenhouse Gases. This is an ambitious goal, but achievable. The u. S. Would cut a third of its carbon emission levels set in 2005 by the year 2025. China would have until 2030 to level off its emissions. The climate accord may be the boldest sign yet of the president s determination to bolster u. S. Ties with china at a time when hes putting heads with russias vladimir putin. The United States welcomes the continued rise of a china thats peaceful, prosperous and stable. Mr. Obama and xi went on to take questions. One from an american journalist. Rare on chinese soil. High drama, the chinese president initially ignored the questi question. Then xi conceded the countrys human rights record is not perfect. China has made enormous progress on its human rights, that is a fact, xi said. Xi eventually answered handlers question, blaming the New York Times for its own access problems in china, the party that has created the problem, xi said, should be the one to resolve it. White house officials breathed a sigh of relief after working for weeks to convince skeptical chinese officials to hold a news conference, it was a diplomatic victory. Mr. Obama toasted xi for chinas efforts to help fight ebola in west africa. Xi offered praise of his own saying the u. S. china relationship had reached a new starting point. Using a lot of big qualifiers for the deal. Whats the meat in the middle of it . What would make it new and more than ever before . Well what president obama and president xi both hope to do is spur change around the world. They figure if the two biggest polluters around world can do this, other countries can as well. This would be a big part of the president s legacy in the United States. If he can get the rest of the world to go along with this Climate Change plan. This is a proposal that has been stymied up on capitol hill. He hasnt been able to get the republicans to go along with proposals to go after Climate Change. So hes hoping he can do this on his own. As mentioned at the top of the show, the republicans have been criticizing this plan announced by the president already. The new Incoming Senate majority leader, Mitch Mcconnell said its unrealistic and a plan that the president would be leaving to his successor. So it remains to be seen how far the president can make the deal work. Quite the commentary there when you can get china to do something before can you get your own congress to do it. Lets go to the enforcement part of this. That will be the big ticket on it. How do you make this stick. Any word on that yet . Or is it too early for that . You know, i think its too early for that. Whats interesting about this is that this is something that both president obama and president xi have been working on for some time. In part in secret. And in a special white house counselor, john podesta has been working on behind the scenes for almost a year now. So if they can get this done, and you just mentioned there are lots of doubts as to whether or not they can do it, this would be a huge part of the president s legacy. I remember covering the president s first president ial campaign in 2008. If you asked president obama what was the one thing you wanted to do as president , he said tackle Climate Change above all of these other things hes done as president. So if it can get done, it will be a big deal for him. To have the u. S. And china being the two biggest offenders coming to a deal, thats a good start to say the least. Jim, good checking in with you from china. Chris, so much International News to tell but this morning. Several developing stories out of the middle east. Escalating tensions in yemen, forcing u. S. Officials to consider evacuated personnel from the embassy in the capital and Iraqi Security forces have retaken a key city back from isis fighters. That city is home to iraqs Largest Oil Refinery and a major electricity plant. And also this morning, a Human Rights Group says the u. S. Led Coalition Air strikes have killed 865 people, most of them militants since the operation started in september. So for everything you need to know about the hot spots overseas, lets bring in bobby ghosh, the cnn Global Affairs analyst and managing editor of quartz. Lets start in yemen, american officials are considering evacuatesing american personnel from the embassy because we have word that al qaeda in yemen has joined forces with al qaeda in saudi arabia, what does this mean . Well the al qaeda in yemen is actually the much bigger group. For a long time it has been the most dangerous of the many franchises of al qaeda. They call themselves al qaeda of the arabian peninsula. This is a bigger deal for the Saudi Arabian unit than it is for the yemenis. But the capital here in sanaa has essentially been overrun by a Shiite Militia thats set themselves up for an open war with al qaeda. Al qaeda has callhood in reinforcements from saudi arabia. Because youre seeing a battle develop between shia and sunni militias. Kaul caught in the middle are all the foreigners. Things are becoming dangerous in sanaa, so the u. S. Is thinking of withdrawing. When the United States embassy says its people have to pull out from a key country like that, you know things are getting quite out of hand. Lets move to egypt, because a militant group, they were called abm. And they have just pledged their allegiance to isis. How troubling is this . Weve seen this happen more and more often. Has isis has become more and more successful in syria and iraq, a lot of al qaedarelated franchises are switching allegiances to isis. We saw it in libya, in pakistan, and now you have a group in egypt saying were pledging allegiance to isis. Theyre trying to attach themselves to something thats successful. This has important ramifications for their fundraising abilities, their abilities to recruit people. Whether it makes them more dangerous to the egyptian authorities, well see. Whether its rhetoric or whether theyre going to act on this something we need to see. In iran youve written an excerpt in quartz that explains how complicated irans relationships are in the region and will be with the United States. Let me read it from the american perspective, iran is not only the enemy of an enemy, meaning isis, but also the friend of a friend. Iraq. And the friend of an enemy, assad and hezbollah and the enemy of a friend, saudi arabia. So in other words, bobby, this is complicated. So iran is now friends with iraq . Iraq and iran have been friends since theres a shiite government. Shiite majority countries. Theyre friends, iran is friends with turkey. Iran is also friends with syria. Iran is a rival of saudi arabia. And pretty much all the gulf arab countries which are sunni countries. And a rival of isis. And a rival of isis. So whats going on here is that the traditional military sort of axiom is the enemy of my enemy is my friend. You seek them out and you can work together. Theres some talk in this country of doing that with iran. Its not as simple as that. This conflict is so complex, that none of those old adages hold true. Were working for instance recently in syria, we were bombing isis to basically help out a Kurdish Group called the pkk. Now turkey, which is our friend, regards the pkk as a terrorist group so essentially we were helping out the enemy of a friend. And these are the kind of calculations the white house is having to make all the time. I mean, there are so many different groups at work here, whos friend, whos foe. It can shift from month to month. Thank you for helping us understand the shifting landscape as it is today. Lets go back to chris. All right. Alisyn, breaking this morning, an historic most high above us, a decade in the making. For the first time ever, a spacecraft is going to land on a comet. Heres what we know. Its all systems go for the lander, its been successfully released from the mothership and touched down with the comet is expected in just over four hours. However, sounds a lot more simple than it is. Thats why fred liken is live for us in germany and he has models to show us this. What do you have, fred . I certainly have models for you, chris and youve caught us at a very interesting and important moment. Now what happened earlier is that the rosetta spacecraft, all of this is happening further away from earth than pluto, it released the lander, thats going do land on a comet of which i have a model. The lander is dropping slowly. Just a couple of minutes ago made the First Contact here back to earth. Every signal that this thing sends out takes a half an hour to get to earth because its so far away. In four hours, they hope it will land safely on the comment. They cant steer this thing at all. Its like throwing a bomb off a world war i aircraft and they dont know what the underground is going to be like. They dont know if theres going to be an even surface for this thing to land. They hope and are quite confident everything goes according to plan and the data they hope to get is to see whether or not human light might have originated from comments, because theyre made of ice, they have a lot of minerals on them. And they think perhaps 3. 5 billion years ago, a lot of these crashed into the earth. Made the first water on earth and the minerals inside the water in conjunction with the sun turned into the first life on earth. A lot of potential data we could get from this mission. You might start getting on the path to answers of how it all began. Stay with us on it, fred, let us know how it goes, well check back in a little bit. Well, meanwhile two u. S. Senators are returning from cuba today emptyhanded. Senators jeff lake and tom udall were hoping to bring an american prisoner alan gross home. This comes days after a Diplomatic Mission to north korea proved successful. Bringing home two americans. So why didnt this mission work out . Patrick ottman is following developments out of havana, what do we know . Good morning, alisyn. This mission was always a longshot from the getgo. You could see the disappointment in these two senators faces, theyre going to be going back to d. C. , with the prisoner serving out the remainder of a 15year sentence. They said that alan gross is increasingly upset at the United States. Not meeting with u. S. Diplomats any more. They were encouraged woe meet with them. They did say that alan gross has threatened to commit suicide. Something he said before, he will not serve out another year in cuban prison. Despite his understandable frustrations, senator jeff lake said progress in grosss case is being made. I do feel were closer there. One, because what alan gross has said himself. This is, this is going to end one way or another. And you know, weve got on five years, i think any benefit that the cuban government may have seen, has to have evaporated by now. In that regard. And the cuban government has said that they are essentially proposing a prisoner swap. They have three intelligence agents that are serving lengthy prison sentences in the u. S. They want to see those agents returned here. The u. S. Has called them spies and has nixed the idea of any kind of swap. They said if any deal can be made any negotiations are going to happen between the u. S. And cuba to free alan gross, that needs to happen now, the senators said. This is not a case that obviously has been in the forefront of americans minds, so please keep us posted as to what happens. Theres more news to tell but, lets get over to michaela. A story weve been watching for sometime, the ceasefire deal between ukraine and russia looks as though its in dire jeopardy. Cnn has learned that fighting between pro russian rebels and the Ukrainian Military has returned to levels preceding the truce, possibly bringing the standoff to a new level. What can you tell us, cnns matthew chance. This truce that has been in force since september in on the ground in Eastern Ukraine was always very shaky. There are growing concerns they are going to return to conflict in the region. The International Observers on the ground in Eastern Ukraine saying within the past 24 hours, sheaf observed 43 unmarked military trucks in the region around donetsk, the main city, five of those vehicles carrying 120millimeter howitzers, big field guns. And the authorities in kiev, the government in ukraine, saying they believe its russian equipment with troops being used to reinforce the pro russian separatists in the region. And disturbing comments made by the supreme military commander of europe, of nato saying look, nato has observed that military bases inside crimea, the area of ukraine that was annexed by russian in march, inside crimea, military bases there, theyre seeing military equipment being deployed by russia that is capable of carrying Nuclear Weapons. Nuclear weapons. Not that there are Nuclear Weapons there. But the actual machinery, the equipment that can carry Nuclear Weapons is in place. So very worrying signals at the moment being sent by the russians to the west. Wore iing indeed, giving the fact that president obama and president putin made some face time over the last few days. An offduty Chicago Police officer is fighting for her life after she and her 21yearold daughter were shot at the daughters home. Reports out of chicago say the daughters boyfriend is the suspect. He was taken into custody hours after he allegedly fled the home with the couples 2yearold child. The child was taken to the hospital for observation. But appeared to be unharmed. The surgeon at the heart of a series of sterilization deaths in india is pointing the blame at local officials. Dr. Gupta says medical distributors gave patients expired medicines after their surgeries. The surgeon says no medicine was distributed at the mobile clinic where the surgeries were performed. At least 11 women have died, dozens more needed medical care after having those operations. A dramatic rescue in dallas, a City Employee pulled from the water by two coworkers after he had some sort of medical emergency behind the wheel of his truck. He lost control, the truck went into this creek. But two guys driving by on their way to a job noticed the brake lights flashing on and off the submerged truck. Jumped in when they realized someone was still inside, used a hammer to bash out the window to save him. The driver said to be in stable condition at an area hospital. Thank goodness they happened to be driving by. These Good Samaritans who are so brave. I love these stories you bring to us. And a that their instinct is to grab a tool and get right in there. People step up all the time. So glad for that. Lets get to meteorologist jennifer gray, in for indra petersons, keeping track of the latest forecast, which we understand will be cold. Yes, very cold. Weve had a lot of snow in the Northern Plains and the midwest, a lot of that snow is going to stay on the ground for the next week or so. As temperatures not expected to get above freezing for quite some time. Denver right now you are at 2 degrees. We are nine degrees below zero in cheyenne, and were a degree below zero in billings. When you factor in the wind chill. Temperatures feeling like 15 degrees below normal in denver. 14 below zero in billings, feeling like chicago is feeling like 20 degrees this morning. And kansas city, at 7. These temperatures are going to stay in place. We are 40 to 50 degrees below normal. Denver, your High Temperature today only 5 degrees. Thats 49 degrees below normal. 17 degrees below normal in minneapolis as we go through the next couple of days. The chilly air is going to head to the east and southeast. St. Louis, your High Temperature tomorrow, 35. And then new york, we go do 50 degrees to 45 degrees on friday. Ten degrees below normal. And temperatures about 44 in d. C. On friday. So guys, these temperatures are going to stay in place for the next week or so. Just reinforcing those cold temperatures. Yikes. The next week or so . All right, thanks for preparing us, jennifer. Well the governor of missouri says he will take steps to prevent any violence whenever the grand jury announces its decision in the Michael Brown shooting. Well debate those steps, next. And speaking of police, theres a Police Officer stuck inside a burning squad car, okay . Just moments from a terrible fate. Then something happened that were going to show you and youre going to, you have to see it. [ male announcer ] youre watching one of the biggest Financial Services companies in the country at work. Hey. Thanks for coming over. Hey. [ male announcer ] how did it come to be . Yours . Ah. Not anymore. Its a very short story. Come on in. [ male announcer ] by meeting you more than halfway. Its how edward jones makes sense of investing. The grand jury decision in ferguson expected any day now, missouris governor is issuing a stark new warning. Governor jay nixon says violence will not be tolerate and anyone who crosses the line will face consequences. Hes considering calling out the National Guard. Meanwhile Michael Browns parents spoke out during a u. N. Meeting in switzerland. Saying the world needs to know what happened to their son, cnns sarah sidener has more. As the grand Jury Announcement on whether to