. . Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening, the Clinton Campaign is vowing to release more information about her health as they face questions of whether they were trying to keep her diagnosis with a case of pneumonia a secret. The revelation came hours after clinton appeared unsteady on her feet after she was being escorted from yesterdays 9 11 memorial here in new york. The campaign, which first attributed her illness to the heat, is now admitting they were slow to publicly disclose her condition. Tonight shes off the campaign trail resting at home and our Andrea Mitchell has the latest. Reporter tonight, Hillary Clinton out of sight, recovering from pneumonia. Cancelling a california trip. After that video showing her nearly collapsing, leaning on secret Service Agents after abruptly leaving the 9 11 memorial service. Aides now admitting disclose more. We could have gotten more information out more quickly, and thats on the staff. Thats on us. We regret that. Reporter the campaign under fire after first saying clinton was simply overheated and dehydrated. Clinton saying she didnt want to go to the hospital, but to daughter chelseas apartment, later leaving to go home. Its a Beautiful Day in new york. Reporter it wasnt until eight hours after she left the ceremony and after the video had gone viral that t c diagnosed with pneumonia on friday, 48 hours earlier. Would you ever disclose it if we had not seen that video . I cant speak to any hypotheticals of what happened. Clearly she needed some downtime. Why not tell people when you learned she had pneumonia . We were focused on getting her to the doctor and making sure she was okay. Reporter again raising issues of secrecy and trust. The instinct to hunker down over this is similar to what drove her to have the pneumonia or colds, one going to the er. A week ago clinton had coughing spells, she said, from allergies. Can i get some water . Thank you. Ill be right back. Reporter both 68yearold clinton and 70yearold donald trump had faced calls to release more medical information. Trump has only released a few paragraphs from his doctor. Clinton, considerably more detailed, but still less than past nominees. In 2008, then reporters to look through thousands of pages of medical records. Because he was suffering from recurring melanoma, a potentially fatal cancer. Tonight clinton tweeted her thanks to wellwishers, saying that shes feeling fine, and shes getting better. And at the same time, the Campaign Announced bill clinton will fill in for his wife tomorrow and the next day on the west coast. Lester . Andrea mitchell. Thank you, andrea nbc news contributor dr. John torrez, an emergency room physician. John, youve seen that video and the statement from secretary clintons doctor and what the campaign is saying. How serious is this condition, and how long does it take to recover . You know, lester, when it comes to pneumonia, i always treat it very seriously for a couple of reasons. Number one, some people will recover on their own, with antibiotics, or if its viral, their body will take care of it. But for some people, especially as we get older, if we have other health issues, it could actually prove fatal. Disease and make sure its treated appropriately. As far as recovery, thats going to depend on a few factors. Number one, how big is the pneumonia. The number two, how long did it take to get treatment started . And number three, whats the persons own Health Condition . If its a walking pneumonia like possibly happened here, that means they werent hospitalized. Its a mild to moderate pneumonia which recovers over ten days to two weeks. But thats assuming antibiotics are started early on. And also assuming they did a three to four strong rest. Meaning they go home, they stay on the couch, maybe do puzzles. They just putt around a little bit. Then they do another seven days to a week and a half of light duty. They have to keep an eye on their own body. If their body is starting to tell them they are needing more rest, they need to slow down. If they dont get the rest, its going to extend the pneumonia or theyre going to collapse. Lester, that might have been what happened here. Dr. John torrez, thank you. Meantime, as health becomes a major topic in this campaign, donald trump has released even less in Hillary Clinton has. Now trump says hell too be releasing more information. At the same time trump is firing back after clinton called half his supporters a, quote, basket of deplorables. We get that end of the story from nbcs hallie jackson. Reporter trying to show hes transparent, Donald Trumps promising to share the results of a recent physical. Ill be handing out a paper with very large numbers of very detailed hopefully reveal or when. Though hes set to appear on the doctor oz show later this week, attempting to prove not just that hes healthy, but that hes not hiding anything. Still, hes released less information than Hillary Clinton has, whether its on medical records or taxes. Trump today largely laying off questions about clintons health. I just hope she gets well and gets back on the trail. Reporter trump instead excoriating her on Something Else what she said Trump Supporters into what i call the basket of deplorables. The racist, sexist, homophobic, xenophobic. The disdain that Hillary Clinton expressed toward millions of decent americans disqualifies her from public service. Reporter both sides eager for this fight, while clintons walking back the number of supporters she called deplorable, shes standing by the label itself. Calculating for her, this could be as damaging as mitt romneys 47 comment last cycle. His campaign out with a new ad, pouncing faster than they ever have before. Viciously demonizing hardworking people like you. Reporter but for a confrontational candidate, possible Political Risk as a new poll shows 60 of americans think trump is biased against women and minorities. It could remind many voters about his extreme pp comments over the past year. Reporter late tonight clinton on twitter hit trumps running mate mike pence, who declined to call former kkk leader david duke deplorable, but pence did clearly denounce the support of duke and anybody else who thinks like him. Lester . Hallie jackson, thank you. Overseas tonight, a fragile ceasefire is holding in syria. After so long the bombing has finally stopped, after a hardfought deal struck by the u. S. And evening can it hold . And can relief reach so many families trapped by this war . We get the latest from our chief foreign correspondent, richard engel. Reporter the battered city of aleppo, a pause today in the relentless bombing. But will it last . People came out to shop and to play. Because at sunset, a hardnegotiated u. S. russian ceasefire came into effect. Across syria, both relatively moderate rebels are supposed to hold their fire for a full week, allowing humanitarian aid. God willing, this truce will hold, give us some relief. Enough, one woman told us. Dont trust the regime, cautioned a man. Aid agencies also have many questions. Exactly who is going to be allowed to get the aid in, what the approval process is going to be, what the mechanism is going to be, were still waiting for some of those details. Armed forces involved in this war, and only some of them have agreed to stop shooting. The Syrian Regime has the support of russia, iran, and hezbollah, a lebanese militia. On the other side are islamists and secular rebels, the kurds, isis, and a few hundred american advisers there to fight them. Its a puzzle with mismatched pieces. And today syrian president assad promised that his troops will liberate every inch of syria. It hardly sounds like peace is in the air. Still today secretary kerry was cautiously optimistic. The earliest reports are that theres a some reduction in violence. Reporter a much needed evening without bombs. But few are even daring to hope that this is the beginning of the end of a vicious war. There are already some accusations that this truce is being violated. Lester, i think well know if its working hours or so, the aid convoys are allowed to reach places like aleppo. If only that happens, it will be welcome relief to the people, but is it the start of the end of the war . Not a lot of optimism. I think the world holds its breath. Richard, thank you. Back home, investigators have released Surveillance Video of a possible suspect in a fire they believe was deliberately set at a florida mosque. That same mosque had been attended in the past by the orlando pulse nightclub shooter. Now our Kerry Sanders explains authorities are asking, was this arson a hate crime . Reporter with just minutes to go on a solemn date, 9 11, an arson fire at a florida mosque. A likely hate crime, say agents. At the same mosque where pulse nightclub gunman omar mateen occasionally worshipped. Tonight investigators have a useful clue to find the arsonist. A Security Camera caught a man running from the scene. That arm waving, say officials, possibly because he burned himself when he set the fire. 911 calls came in shortly after. It looks like a church. Im assuming its a church. Do you see flames coming from the roof . Yes, and i see like a whole bunch of smoke. Reporter witnesses say the fire spread quickly. We have one commercial structure. Its about 25 involved at this time. Flames through the roof. Reporter this morning, more than a hundred members of the mosque had planned to hold service here for eid, the holiest of days in instead this morning, they hastily joined a congregation at a nearby mosque. Everybodys obviously saddened and scared about it. But, you know, our community is bigger than a building. Reporter ever since omar mateen claiming allegiance to isis killed 49 people at a gay nightclub in orlando, there have been numerous threats and Violent Attacks at the ft. Pierce islamic center. In july, a member was beaten up by a stranger in a parking lot. Its unacceptable the others would have to somehow be held accountable for it. Thats unamerican. Reporter tonight with the possibility the arsonist may have burned his arm, authorities are checking with local hospitals and hoping if somebody knows something, they give the police a call. Kerry sanders in florida tonight, thank you. A devastating house fire in memphis has claimed the lives of nine family members. Among the dead, three adults and six children, ages 3 to 16. A fourth child is fighting for life tonight. Deadliest fire in memphis since the 1920s. The cause remains under investigation. A horrific crash in colorado is raising more questions about the safety of our Nations School buses. The driver was killed and several members of a High School Football team were injured when their bus veered off the road and slammed into a concrete pillar at denvers international airport. Nbcs Miguel Almaguer has the latest. With a High School Football team, the headon crash was so violent, driver carrie chopper died on scene. Three adults suffered serious injuries. At least 15 students sent to the hospital. Police still dont know why the bus veered off the road at Denver International airport. The tire tracks did not show any sign of left or right turns, simply drove straight off the roadway into that pillar. Reporter with students and staff grieving, tonight new questions over safety. Michelle crawford refuses to let her children ride the bus, because they have no i dont think its a lot to ask for a threepoint, lapshoulder belt that theyre using in their car every single day. Reporter though School Bus Crashes are rare, the accidents are high profile. 29 were hospitalized after a rollover in indiana. In houston, two children killed when their bus veered off an overpass. 26 million children were killed in School Transportation crashes. Federal law does not require but federal officials now support seat belts on every bus. Lives will be saved if we put threepoint belts on buses and they are used. Reporter school buses have long been the safest way for children to get to school, but tonight many say more needs to be done to keep them safe. Miguel almaguer, nbc news. Much more to tell you about tonight. Skyhigh medical costs. How to shop around for the treatment you need and get the Insurance Company to actually pay you for it. Also, flu season is just around the corner. We have a warning about the dangerous mistake so many parents make when giving their children were back now with a new effort against skyrocketing Health Care Costs under control by paying patients to choose the most costeffective option. Expected to rise another 6. 5 this year and next, some employers and insurers are encouraging customers to shop around, even giving them a kickback on the savings. Heres nbcs tom costello. Reporter the drug treatment Paula Bennett receives every eight weeks for her Crohns Disease should require a 30 insurance copay. That. Im making money. Reporter making money because shes treated at this New Hampshire clinic rather than a more expensive hospital nearby. I get 500 every time i go in for the treatment. Reporter they pay you 500 . They pay me, because the savings is that substantial for the Insurance Company. Reporter very substantial. The treatment costs 4,000 at the clinic, 40,000 at the hospital. Its called smart shopper, used by a small but growing number of employers and insurers to drive down medical costs by giving patients a cut of the savings on standard treatments and surgeries. Replacements to mris. Not cancer, not heart surgery. In miami, gall bladder surgery can cost anywhere from 5,000 to 19,000 depending on the facility. Yet both are highly rated. If i choose to have my gall bladder removed here, which is cheaper option, youre going to send me a check for 150 bucks because of the savings. Correct. And it will cost you less as well, your outofpocket. Reporter some Health Advocates worry choose cheaper and low quality care. But several studies have shown often the best care isnt the most expensive. Yet very few patients shop around. We have no idea if the bill is going to be 20 or 400. Where else in your life do you shop that way . Reporter patients choose the highest rated and most Cost Effective options. Paula is convinced she gets better care at a smaller clinic. This is really about your quality of life. Yes, it is. Reporter and you get paid for the treatment . I do. Need anything else . Reporr tom costello, nbc news, bedford, New Hampshire. Were back in a moment with the unlikely way a wouldbe president ial assassin spent his joer the man who attempted to assassinate president Ronald Reagan is now free from a Mental Hospital after decades. John hinckley jr, now 61 years old, was virginia. He was spotted yesterday shopping at a target store. A judge ordered his release after declaring that psychiatric treatment has been effective and hinckley has no signs of any violent tendencies. An alarming new warning for families as flu season draws closer. A new study finds over 80 of parents have accidentally given children the wrong dose of liquid medicine, which can cause an overdose. Researchers suggest using an oral syringe because the odds of making a mistake are four times less than come with medicine bottles. Youll be seeing new faces live from new york this fall. Saturday night live announced today its adding three new players to the cast for the upcoming 42nd season comedian mikey day, alex moffat, and melissa villasenor. Theyll likely be featured players, some fresh additions following the departures of jay pharaoh, taran killam, and jon rudnitsky. When we come back, the inspiring story of give nearly two dozen finally tonight, the race is on in memphis to build nearly two dozen homes for families in need. Value of having a home to call your own. Hes getting help from a former commander in chief. Nbcs Gabe Gutierrez has more on someone who is inspiring america. Reporter just north of downtown memphis, home is a little sweeter. I think my greatest joy definitely is seeing the families get the keys to the home. Reporter Dwayne Spencer is the local president and ceo of habitat for humanity, side with president jimmy carter to house 21 families this fall. Everyone deserves a decent place to live. Reporter he would know better than most. Did you realize what type of poverty you were in . I did. And i was embarrassed by it. Reporter in the early 80s his family lived in crippling poverty, in a shack with almost no Running Water in rural tennessee. Their home burnt down hes returned in years. Im thinking that we used to walk down this hill to actually use the bathroom. It makes me emotional. Reporter his steep climb took him from a mail room to graduate school. It was the beginning for me. To be able to move out of that situation into something, into the 21st century. Reporter the past still haunts maria mckinney, who remembers the day she couldnt make ends meet and learned she and her kids would be evicted. Dwayne spencer gave her much more than four walls. Every family needs a good stable home to raise their children in. Reporter under spencers leadership, habitat has tripled in size. I dont think your past is completely indicative of what your future will be. Reporter in some ways, hes come quite far from his humble beginnings. In others, hes never felt closer. Gabe gutierrez, nbc news, memphis. And that will do it for us on a monday im lester holt. For all of us at nbc news, thank you for watching and goodnight. Right now on news 3 live at right now on news 3 live at 6 00 Walter Johnson junior ready to reopen to students but still plenty of answers to question about the source of the mercury decontamination that families. Plot to kill donald trump. The man who wanted to shoot donald trump is said to plea guilty. The punishment Michael Sandford faces. Helping a community in need. The unusual pairing behind this project. Bottom line is this was a serious event. I want to make sure its known that the district took it very instances and will continue to do so. Well, tonight, we do know the school will be open tomorrow, nearly a week after the mercury was discovered at Walter Johnson junior. Thanks for watching. Im reed cowan. Im Marie Mortera in for jim snyder. Some 80 homes where students live have been checked for contamination. This is our top story. Our coverage begins with Kelsey Thomas live at Walter Johnson junior. Clean. Reporter they say the school is clean even though they do not know who brought the mercury and they told me they feel comfortable with opening the school tomorrow. They say its clean for both kids and students. We doesnt know who brought in the meck who brought in the mercury, if it was a child and where they got it. This 6th grader got his