There are some answers to new questions about Hillary Clintons health. She became ill sunday at a 9 11 ceremony in new york and was seen stumbling as she left. First her Campaign Said she was overheated. Hours later after she left her daughter chelseas apartment, more details came out. A statement from her personal physician reads as follows. Secretary clinton has been experiencing a cough related to allergies on friday during a followup evaluation of her prolonged cough she was diagnosed with pneumonia. She was put on antibiotics and advises to rest and modify her schedule. While at this mornings event she became overheated and dehydrated. Ive just examined her and she is rehydrated and recovering nicely. Clinton has canceled a Campaign Trip to california this week so she can rest at home. Cnns chief medical correspondent dr. Sanjay gupta tells us more about her pneumonia diagnosis. Were still getting some details in about what exactly may have precipitated what youre seeing in this video here with secretary clinton. Clearly having some trouble getting into the van. Seems to stumble. What we heard initially as you now probably know is that this was due to an episode of overheating. Sort of a vague term. Then just a few hours later we heard that secretary clinton had been diagnosed with pneumonia but that took place on friday. Today is sunday. And that it was pneumonia and bacterial pneumonia for which shes being treated with antibiotics that may have made hear condition worse. The way were hearing from the campaign and from her personal doctor, dr. Lisa barback is she was dehydrated, overheated and there are still bits of information we dont know. How did she get diagnosed . A chest xray . When was she seen by a doctor. What kitype of bacteria is causg this and whats the impact going to be on her travel schedule . Should she be traveling on a plane and doing other events . Should she be resting and getting rehydrated anyone more. These are open questions. Were not sure well get any answers to those questions over the next several hours. As we get the information, well certainly bring it to you. This situation certainly raises questions about transparency for both candidates about their Health Situations. Clintons pneumonia is forcing a temporary slowdown in whats been a very packed campaign for her. Dan marica spoke with poppy harlow earlier about clintons schedule going forward. Hillary clinton will not be going on a twoday california trip that was scheduled long before long ago. She was supposed to headline a fundraiser in San Francisco, a large headliner in San Francisco tomorrow night. She was going to then fly to l. A. Where she had two events. One with Lionel Richie and another with diane von furstenberg and an appearance on the Ellen Degeneres show. Shell not be making this trip. Right now the next open event will be in las vegas where shes supposed to headline a rally and speak about the economy in las vegas on wednesday. This is basically an acknowledgment from the Clinton Campaign this pneumonia diagnosis is an issue. I was struck when the doctor put out a statement earlier today and said that i advised secretary clinton to change her schedule. The fact the Clinton Campaign allowed that line to be in the doctors statement was fairly telling. It nodded to the fact that, a, this was an issue for them. Something they took seriously and they were seriously considering the amount they scheduled secretary clinton. The way she raises money and has raised money throughout this campaign has been very labor intensive. It requires her going from place to place headlining events like the one she was supposed to do in the next two days. Shes headlined over 330 fundraisers as a candidate and over 37, i think exactly 37 in august. Thats a lot of work and its a lot of time spent raising money. There are serious questions within the Clinton Campaign tonight whether they are overscheduling her. But you know who is quiet right now . Yes. Donald trump. Surprisingly quiet. Not commenting on Hillary Clintons health issues. He told reporters on sunday he did not know about the incident. Both campaigns decided to pause for 9 11. Of course. And sources from Trumps Campaign tell cnn they want to be respectful of clintons health issue. They also say staff and Campaign Surrogates have been told not to post anything negative about the Health Incident on social media. One source says if they do, they could be fired. Political analysts are questioning the twoday delay at announcing this pneumonia diagnosis. A panel of them discussed it earlier with cnns poppy harlow. Take a listen. As far as the Trump Campaign, i think theyre finally showing the discipline that would have been helpful to bring to the table a long time ago. They shouldnt say anything. Listen, the whole country wishes Hillary Clinton well. We want her to recover. And good for her that shes taking a couple days off the trail to get back into shape. That said, i must tell you that echoing carl bernstein, they would have been so much wiser to have dealt with this pneumonia on friday and just put out a statement. Candidates routinely come down with illnesses in these president ial cam. As campaigns. These are grueling experiences. Shes been diagnosed with pneumonia. Shes going to get over it. Shell be back on the trail soon. And then all of this would have evaporated. As it stands now, she is seen once again, even as she was trying to tell im going to be more transparent, shes seen as like they were covering is it until their hands were forced. So, david, why do you think she didnt . Why do you think the campaign did not do that . Even this morning the statement that nick merrill her spokesman put out was that she was overheated. He could have at that time said she had pneumonia. Its the most baffling question surrounding Hillary Clinton and her campaign. This woman is so accomplished in so many ways. Its so obvious. Its so obvious that they are not helping themselves and really being living up to their responsibilities as a candidate. It is absolutely true that donald trump has covered up far more and both these candidates ought to be held to a much higher standard. Tonight were deal with a story that suddenly has been given legs. The alternative right was pushing all these Conspiracy Theorys. Tonight were into a situation where its a legitimate Campaign Issue about her health. People need to know and i think she will release her Detailed Health records, as i think mr. Trump will be eventually forced to do with his health records. Historically, way back when, Franklin Roosevelt could cover up he was in a wheelchair. In hyde park, his museum, there are thousands of pictures of fdr as president. Only two showing him in a wheelchair. John f. Kennedy lied to us about his health care but in recent years its been required, expected especially of candidates approaching or in their 70s. Ronald reagan, bob dole, john mccain. All of them had to release their health care records. So douglas brinkley, you are a president ial historian. Speak to the history here. A, on, you know, how much this affects how people vote a candidates health or critically perceived health and also the fact in recent elections, john mccain, for example, weve known a lot more about the health of the candidates than we do this time around. Thats right. And i agree with everything david gergen just said. One of the problems Hillary Clinton has is that concussion back in 2012. And she had double vision and was sort of an unusual twomonth period for her. And nobody really knows what thats all about. N thats fed some of the Conspiracy Theorys. But the fact of the matter is the Clinton Campaign, the fact that here friday they got a morning diagnosis of pneumonia and had her run one of the most grueling schedules i can imagine. Im sure she wanted to, but it was in that moment friday, that basket of deplorables comment came out by doing another fundraiser that wasnt necessary when she should have taken a lot of the weekend off. Shes starting this week not only canceling california, but im afraid that baskets of deplorables is going to be haunting her campaign for weeks to come. So the best thing she can do is what shes doing. Reboot, recharge. Take a few days off. Maybe pick up the Ellen Degeneres interview. Maybe give that the exclusive on the recovering of pneumonia and get to las vegas and start doing rallies, not just fundraisers. Our jeff zeleny just reporting that Hillary ClintonsCampaign Press secretary is coming out and confirming what aides told us that shell not be going to california monday or tuesday. Carl bernstein, you know the woman, you wrote the book on her. As joe johns was reporting earlier, look, this is someone who powers through. What do you expect her to do now . Clearly shes resting at home. What will her next step be . I dont think we can predict. We can hope some people around her will finally say, hillary, you have to open up in all kinds of ways here because thats when youre at your best. I think among other things, she and her doctor need to be in front of the press for an hour with medical records and discussing and open to questions about her medical history and donald trump needs to do the same, and we need to demand it of both of them. Across the United States, ceremonies have been held to commemorate the 15th anniversearies of 9 11. Nearly 3,000 people lost their lives in the worst terrorist attack on u. S. Soil. On sunday, the nation paused to remember the dead. 15 years may seem like a long time but for the families who lost a piece of their heart that day, i imagine it can seem like just yesterday. Michael patrick aiken. Frederick j. Il jr. And my father, john patrick gallagher. Dad, me and mom think about you every single day, but well never stop loving you and missing you. Steven a. Knap. Eugenie. And my uncle andrew fisher. Words cant describe how much everyone loves you and misses you, and i look forward to us finally meeting in heaven. We remember, and we will never forget the nearly 3,000 beautiful lives taken from us so cruelly. We come together in prayer and in gratitude for the strength thats fortified us across these 15 years. And we renew the love and the faith that binds us together as one american family. And for my late husband, my late brotherinlaw and my brother thomas, 15 years later, the love you three shared while you were alive still lives on in all of us. May god bless the memory of the loved ones here and across the country and may god forever bless the United States of america. For the land of the free and the home of the brave and the new york skyline was illuminated by the tribute in light to mark the 9 11 anniversary. The tribute began six months after the attacks. It is now part of the annual memorial service. Organizers say the beams can be seen as far as 96 kilometers, or almost 60 miles away. Welcome back to cnn newsroom. At least seven people are dead after new air strikes in aleppo, syria. This as a nationwide ceasefire is set to begin at sun down. Three of the dead are children. This latest attack comes as rebel groups say they have doubts now about the u. S. And russiabacked ceasefire. A representative from the Free Syrian Army tells cnn it doesnt trust the Syrian Government. It says that its made those reservations known to the United States. The Syrian Government announced its support of the deal saturday amid more air strikes on rebelheld areas. A Rights Group Says at least 90 people were killed in air strikes on aleppo and id lib over the weekend. Were live in ahman, jordan, this hour. Lets talk about the cessation of hostilities set to begin at sundown but there have already been air strikes, more barrel bombs leading up to this. Where do things stand right now . Well, as you mentioned, george, were expecting the cessation of hostilities to take effect in a few hours. After this weekend of air strikes in aleppo and idlib leaving more than 90 killed. There was no letup in the violence. Were getting reports about fight, air strikes taking place in different parts of the country. As you mentioned in aleppo, they say seven people were killed, including three children. Also were hearing reports from the southern part of the country just bordering jordan. Reports of at least 16 barrel bombs being dropped there. We dont have word yet on casualties. And also hearing from state tv. Syrian state tv saying that the rebels who they describe as terrorists also shelled the western regimeheld part of aleppo this morning. This is the day that is supposed to be a day of peace but there is no sign of the violence in syria stopping at this point but, of course, george, those weve spoken to in the rebelheld areas hope there will be a pause in the violence because they want to see humanitarian aid come into the city but, of course, lots of doubts about whether the guns will fall silent at sundown today. If they do, how long will this last where we have seen truces fall apart in the past . The air strikes, the violence continuing, but a difference image that we have seen. These images of the syrian president Bashar Al Assad performing prayers in the da t damascus suburb. This is a very traditional thing for heads of state to do. They perform prayers usually in a grand mosque, the main mosque in the capitals or any part of the country. But today we were seeing these images from syrian state tv showing president Bashar Al Assad praying in a small mosque in the damascus suburb of daraya. Daraya was one of the first syrian damascus suburbs to rise up against the regime in 2011. Peaceful protests there in 2012. It was taken over by rebel groups. And for years it was under siege by the regime. It endured constant bombardment and cut off from the world with no water supplies, no food. And just until last month, george, we saw a locally brokered truce deal between the government and the groups in daraya allowing for the evacuation of the fighters into Idlib Province and civilians out into other parts of damascus. This was hugely symbolic, seen as a victory. A very symbolic victory for the Syrian Regime and big blow to the rebellion against Bashar Al Assad. As we see today, a very strong message from al assad praying in daraya. A moment there, photo op, you could say, showing the syrian president. But at the same time, the violence continues in this hellish civil war that has been going on now for year after year after year after year after year. Jamonica, thanks for your reporting. Well stay in touch with you. Of course, the stakes are high for the latest Syria Ceasefire deal. Hundreds of thousands of people have died in over five years of war. Im joined by fawaz gerges, the author of isis, the history. Also at the London School of economics. The bombs have continued to fall ahead of this u. S. russia ceasefire going into effect. How likely this truce will succeed, do you think . We have to wait and see in the next hours if the United States and russia will succeed in exerting pressure on the respective clients. The United States via the opposition and russia, via the Syrian Regime. My take on it is that the odds are against a successful ceasefire. We have been there before. Two points. The opposition is deeply divided. One of the largest and most powerful rebel groups has already said that it will not abide by the ceasefire. You have also al qaeda. It used to be called al nusra front. Al qaeda will do everything in its power to basically sabotage this particular ceasefire. And finally, will russia succeed in convincing the assad regime to freeze its air force. If i were assad in damascus, my air force is the only strategic weapon that i have visavis the opposition. So there are many ifs. There are many questions. And even if the ceasefire holds in the next few days, the big question is, for how long, given the absence of a political horizon because without a political horizon in syria, i doubt it very much whether any ceasefire would hold. Of course, it was such a tortured effort to actually get to this point. You dont think theres much chance for this ceasefire. So what needs to be done to make sure that there is a long lasting ceasefire . Is that even possible, do you think, given the circumstances . I think the situation is very complex. There are many players entangled in the syrian quagmire. Syria now is a battlefield for regional wars by proxies. Where are the regional powers . Does iran and saudi arabia, the two leading powers, really agree or accept this particular ceasefire . And even the United States and russia again as we know, president barack obama has made it very clear theres a deep crisis of trust between the United States and russia. The Defense Department and our intelligence communities in the United States do not really trust the russians. And the Defense Department was extremely blunt in its report after the agreement was announced by john kerry and lavrov. It says we have to wait and see. If russia delivers on its promises and then we can begin the proces