dr. jon lapook. thank you. clinton's doctor released a statement saying mrs. clinton previously had been diagnosed memorial services across the nation sunday. in remembrance of the september 11th attacks, 15 years ago. here is jamie yuckas. >> at ground zero, 1,000 people, victims' families, dignitaries and politicians marked 15 years since 9/11. >> this is a country, we were never more reunited. >> readings and singers added for the milestone year. ? may you always do for others ? ? and let others do for you ? [ bell tolls ] >> the day started with the traditional moment of silence. a bagpipe procession played under overcast skies. tolling bells filled the air. my dad vincent worked in the north tower. >> relatives red the names of those killed in the terror seen that beautiful face and that funny smile. >> in washington, d.c., the american flag was unfurled over the side of the pentagon in the exact spot where the plane hit. killing 125 people. president obama thanked the men and women who have served the country since the attacks. >> thanks to their extraor

dr. jon lapook, thank you, jon. we learned more about clinton's former president this afternoon. >> she is doing fine. she was even better last night before she went to sleep. she had a good night's sleep. she just got dehydrated yesterday. >> is that what happened? >> yeah. >> because when you look at that collapse, that video that was taken, you wonder if it's not more serious, than dehydration. >> she's been-- well, if it is it is a mystery to me and her rarely but on more than one occasion over the last many, many years, the same sort of thing has happened to her where she got severely dehydrated. and she has worked like a demon, as you know, as secretary of state, ands a senator, and in the years since. >> but more importantly she's on a grueling campaign. >> yeah. >> and you know what that is like. >> i do. >> an she is older than you were when you ran. >> and she had two and a half she got dizzy. today she made a decision, which i think was correct, to cancel her campaign day. >> right. >> to make one more da

dr. jon lapook is our chief medical correspondent. dr. lapook, what do you see in sh video. >> reporter: first it's important to point out i'm not mrs. clinton's physician and i'm trying to put things in perspective based on limited information. but what i see in this video is someone unstedy and wobbly but conscience on a hot and humid day in new york city like today, a likely possibility is something relatively innocent person's blood pressure or pulse drop causing diziness or fainting. today she was apparently standing for more than an hour in hot humid weather it was 80 degrees with over 50% humidity wearing pants and long sleeves. a total setup for a vasovagal. the normal immediate treatment is for a person to lie flat. that way it's easier for blood to get from the heart to the head. one very good sign is that mrs. clinton went to her daughter's apartment rather than to a medical center and that she soon emerged apparently looking >> ninan: we know mrs. clinton has had health problems in the past but what are the concerns following

dr. jon lapook. thank you. clinton's doctor released a statement saying mrs. clinton previously had been diagnosed memorial services across the nation sunday. in remembrance of the september 11th attacks, 15 years ago. here is jamie yuckas. >> at ground zero, 1,000 people, victims' families, dignitaries and politicians marked 15 years since 9/11. >> this is a country, we were never more reunited. >> readings and singers added for the milestone year. ? may you always do for others ? ? and let others do for you ? [ bell tolls ] >> the day started with the traditional moment of silence. a bagpipe procession played under overcast skies. tolling bells filled the air. my dad vincent worked in the north tower. >> relatives red the names of those killed in the terror attacks. seen that beautiful face and that funny smile. >> in washington, d.c., the american flag was unfurled over the side of the pentagon in the exact spot where the plane hit. killing 125 people. president obama thanked the men and women who have served the country since the attacks. >> thanks to thei

dr. jon lapook. thank you. >>> we learned more about clinton's condition from her president this afternoon. >> she is doing fine. she was even better last night before she went to sleep. had a good night's sleep. she got dehydrated yesterday. >> is that what happened? when you look at that collapse, that video that was taken, you wonder if -- if it's not more serious? >> no. >> than dehydration. >> she has been, well if it is, it is a mystery me to me and her doctors. rarely, on more than one occasion over the last, many, many years, the same sort of thing happened to her when she got severely dehydrated. and she has worked like a demon as you know as secretary of state, as a senator, and in the years since. >> but more importantly. she is on a grueling campaign? >> yeah. >> you know what that is like? >> i do. >> she is older than you when you ran. >> she had 2 1/2 hard days she got dizzy. today she made a decision, which i think was correct. to cancel her campaign day. >> right. >> is it possible s

dr. jon lapook. thank you. husband. charlie rose spoke to the former president this afternoon. >> she is doing fine. she was even better last night before she went to sleep. had a good night's sleep. she got dehydrated yesterday. >> is that what happened? when you look at that collapse, that video that was taken, you wonder if -- if it's not more serious? >> no. >> than dehydration. >> she has been, well if it is, it is a mystery me to me and her doctors. rarely, on more than one many years, the same sort of thing happened to her when she got severely dehydrated. and she has worked like a demon as you know as secretary of state, as a senator, and in the years since. >> but more importantly. she is on a grueling campaign? >> yeah. >> you know what that is like? >> i do. >> she is older than you when you ran. >> she had 2 1/2 hard days before -- before the day when i think was correct. to cancel her campaign day. >> right. off a >> is it possible she will be away for weeks from the campaign trail. >> no, not a shot. i wil

dr. jon lapook is here, our chief cbs news medical correspondent. jon, pneumonia is that a unsteadiness we saw in clinton the other day? >> it is. pneumonia can cause weakness, dehydration. on top of that standing outside in the hot with, wearing long sleeves and pants. that is a setup for further dehydration which could cause drop in blood pressure and kind of wobbly gait we saw. >> how fast does somebody recover from pneumonia? >> person's age, general health, what's the size of the pneumonia. how much of the lung is involved. we don't know that at all. what is the bug that is causing it. she is on antibiotics, that treats bacterial pneumonia, exactly what is being done to determine the organism that its causing it. in general, patients with mild pneumonia can be treated with antibiotics as an outpatient successfully and fully recover. >> is it a good sign she is at home? >> i think it is. unless they're bringing the hospital noo her house the a good sign she is at home rather than in a hospital. sickest patient generally are hospitalized. >> dr.

dr. jon lapook says the diagnosis does help explain clinton's health troubles at the 9/11 memorial. >> first, it's important to point out i'm not mrs. clinton's physician and trying to put things in perspective based on limited information. pneumonia can make you weak and dehydrated. on a hot day, with further dehydration, a likely possibility for her unsteadiness person's blood pressure or pulse drop and causing dizziness or fainting and she was apparently standing more than an hour in hot humid area and 80 degrees with over 50% humidity wearing pants and long sleeves, a total setup for vasovagal. >> clinton's physicians have placed her on anti-bicycles and implying they think bacteria are involved. pneumonia is commonly treated quickly and effectively and her doctor advised her to rest, which is pretty tough to do in the heat of a presidential campaign. >>> before revelations about her health on sunday, clinton's quip about trump's supporters would have likely be >> you could put half of trump's supporters into what i call the basket of deplorables. right? the racist, sexist, homophobic xe

dr. jon lapook has found loss. >> reporter: as part of the n.y.p.d.positive highway patrol, anthony flammia, then 38, was one of the thousands of responders who descended on the world trade center. >> i saw the horror of people jumping out of the building. the smoke, i remember smelling the smoke and the jet fuel. >> reporter: in 2007, symptoms of post-traumatic stret disorder or p.t.s.d., emerged when he responded to a house fire. >> i remember pulling up in from that point on, i don't remember what happened. >> reporter: what do you think happened? >> i blacked out. >> reporter: flammia's police career was over. the p.t.s.d. triggered blackwrowtz he lost track of time. often just smelling smoke caused flash backs. >> i couldn't eat barbecue for quite some time. >> reporter: because? >> because of the burning on the barbecue, if you burned something on the barbecue. >> reporter: and reminded you, the smell-- >> reminded me of 9/11. >> reporter: he also started to have memory problems. what is it you can't d that you could do before 9/11. >> my short-term memory is almost gone. >> reporter:

dr. jon lapook. >> most people are biased. to our research, the majority of americans show some degree of unconscious towards minorities. >> reporter: n.y.u. psychologist david amodio studies the science of racial bias and prejudice. in this test, subjects are shown a picture of a black or white male carrying either a gun or a harmless object and must make a quick decision to shoot or not shoot. >> and now you are the in role of a police officer, and what's been found is that if the person who appears is black and they're holding a cell phone or a soda can, people are more likely to accidentally shoot them than if likely to shoot an unarmed black person than an unarmed white person. >> when we viewed eye tracking in that task what we find is the eyes always go to the person's face first and then tracks down to see what's in their hand. >> reporter: so they see their color first. >> yeah. >> reporter: and they may make a biased decisioned based on that. >> and it's automatic. it happens in one or two millisecond. >> reporter: c

dr. jon lapook is here, our chief cbs news medical correspondent. jon, pneumonia, is that a the other day? >> it is. pneumonia can cause weakness and dehydration. on top of that, she was standing outside in the hot weather wearing long sleeves and pants. an that's a setup for further dehydration which could cause a drop in blood pressure and the kind of wobbly gait we saw. >> pelley: how fast does somebody recover from pneumonia. >> scott, that all depends on a number of factors. a person's age, their general health, what is the size of the pneumonia, meaning how much of the lung is involved. we certainly don't know that at all. and what is the bug that is causing treats bacterial pneumonia but exactly what is being done to determine the organism that is causing it. in general patients with mild pneumonia can be treated with antibiotics as an outpatient very successfully and fully recover. >> pelley: is it a good sign that she is at home. >> i think it is. unless they are bringing the hospital into her house, i think it is a very good sign that she

dr. jon lapook talked to c.d.c. >> reporter: how much money you have spent so far, about? >> we were allocated $222 million for domestic zika control. already, about $200 million ofdo that is out the door, and the rest will be gone in the coming weeks. we're basically running on empty at this point. >> reporter: what happens when you run on empty? >> that means that we're having to make really difficult choices. we're having to not invest in some of the longer-term things that are so important-- doubling wn diagnosis of zika, and improving the way we control mosquitoes. >> reporter: do you think it's fair to say that we've already blown the chance to get ahead of the zika epidemic? >> it's not too late. if congress acts soon, we can invest in programs that will help us understand zika better, diagnose it better, and control it better. >> reporter: is the money going to be there when congress returns next week? >> i can't predict the course of that, but i can predict that thu money for zika is the zika virus. >> reporter: dr. frieden says the only way to avoid this kind of