@ajconsiderthis. we'll see you next time. go al jazeera america, i'm morgan radford. john seigenthaler has the night on. it's 11:00 p.m. on the east coast, 8:00 pm on the west. you are watching the only live newshour. thank you for joining us. >> this is not theatre. it's a problem. battle over the bodder - the president defends his efforts to tackle the immigration crisis. and running for shelter. a wedding in israel interrupted by a rocket attack.

get up, stand up - a new study revealing how bad sitting is for you, and taking the plunge. a look at the world's tallest water slide. imagine that. immigration reform front and center tonight. the president in dallas on a fundraising trip meeting with local leaders to take about the flood of immigrants crossing the border. among the leaders governor rick perry, the one-time presidential candidate who thats there are not enough resources at the border. some democrats are criticising the president. >> reporter: what about what some of the democratic members are saying, criticising him for not going to the border, especially if he's in texas

fundraising. one of your democrats say they hope the border is not president obama's katrina moment. many chris sized bush for not -- criticised bush for not heading no new orleans after katrina. >> there is an issue. if he had been in the area, i probably would have gone to take a closer look at what is going on. it's not like he can't see it. or he hasn't been told about it. i think it looks bad for the president to go to a state and not take - not take a look at the - you know, the issue that is right in front at the time. now, one action the president has tape is to ask -- taken is to ask congress for $3.7 billion to deal with the unfolding crisis. ? members of senate met today. more later. first jonathan martin brings us a day in the life of the boarder. >> reporter: sitting on the teme

texas border, mccallan is the center of a humanitarian effort. each day hundreds of tired and frightened families make their way to this area. all they have is the clothes on their back and a notice to attend court. >> they have an opportunity to take a shower, eept, see a doctor -- eat, see a doctor. >> the groups of women come in after being contained by border patrol. most from central america, caught crossing the border. this sister opened the shelter after seeing undocumented families with nowhere to turn. >> the people have been detained by immigration and released and have a paper to travel to the united states. we are not aiding and abetting, we are assisting motion that we see in the community, that need care. we are doing a humanitarian response. a care that anyone would do, anyone that is protesting

against it should see the face of a child, and would help as well. you know, it's a human being. >> for most families, the shelter is only a rest stop. a place to stay until they can catch a bus and reunite with family elsewhere in the u.s. their journey from honduras to the u.s. border took two months. they were detained on monday and are set to appear in court next month. >> i want to find a job. i was given the opportunity, i want the chance to work. i want a better future. >> reporter: border facilities are flooded with families entering the u.s. illegally, and a growing number of children arriving alone. since october 57,000 children are detained. >> the children are coming, with an adult, in some cases some of the mums are saying that they brought their kid, but their

nephew, and their nephew was removed and separated because she is not the mum. they were unaccompanied. >> the result is overcrowded shelters and processing delays for children looking to reconnect with families in the u.s. >> jonathan martin. >> laby casey -- libby casey has more on the meeting in texas with governor rick perry and president obama. >> the end goals are not so different the the governor brought up concerns about the wait times. the president said if congress gives the funding they can shorten the window. and the governor brought up concerns over having resources to make sure the people are stopped at the border. the president said it's up to congress to work with them to pass funding. >> what i emphasised is the problem here is not major

disagreement around the actions that could be helpful in dealing with the problem. the challenge is is congress prepared to act to put the resources in place to get this done? another way of putting it, and i said this directly is are folks more interested in politics or solving the problem. >> the president caught flak from governor perry and border democrats for not visiting the border where so many of these problems are happening. he pushed back on that tonight saying members of the cabinet are going down to visit, including the secretary of homeland security, jay johnson, who has been there five times, is planning another trip and is reporting back. the fight over whether congress will approve a request for emergency funds is in action in washington. some democrats concerned that

the president obama administration will go too far in trying to send children home to central american countries, and republicans saying it's not tough enough on border security. >> joining us is christopher wilson, who is advising the united states military and currently with the institute at the wilson center. thank you for being with us. first off. is this a security issue, or is it a humanitarian one? >> it's certainly a humanitarian issue. it's also an immigration issue, a crisis, really, a humanitarian crisis and humanitarian crisis. increasing the number of ates on the ground, boots on the ground bringing in the national guard and putting them on the border will not fix this at all. the people crossing the border, this new wave of unaccompanied minors seeking out the border patrol, they are seeking it be

put into custody in the united states, so that they can be processed and released to a family member as they go through the immigration system in the united states. so i think it's - there's a security crisis in central america. i don't think this is a border security crisis. >> to be clear on what you said, you say the minors want to get caught. >> yes, they are coming across the border. in most cases they are told by smugglers on the other side of the border, who are sending them across, to seek out the border patrol and turn themselves in. families are doing something similar. >> what is the united states to do? if the dangers are not enough, what could actually deinsent vice the minors from crossing all alone? >> yes, i think - i mean, what the united states is looking are is ways to speed up processing to move from a detention or an apprehension at the border to deportation faster for those that don't meet qualifications

to be accepted under asylum. processing time is key. speeding up the time so there's a clear sign that some people at least, those that don't meet qualifications are sent back to their home country, we, us know, need to be careful about speeding up the processing time too much. we have legal obligations and moral obligations to make sure that those that qualify for asylum and protection as victim of human trafficking are treated in a different way. so the question is how fast can we speed it up while taking care of the rights of the kids and obligations as a country. >> i wanted to go back to the pointed in terms of a moral obligation. do we give up on the obligations because it's not convenient? >> well, it's very complicated. i think - basically there's an

issue of fare. whether the individual has a credible fear, it's more than that. it depends. it was created with the situation of conflict in which case there was violence from those reasons. we are not experiencing that. what is happening is gang and organised violence. it hasn't been very kind towards those situations. the u.n. is concerned about the situation. there's talk about whether or not these should be considered refugees, which is a different legal process. but, yeah, the point though is that we need to figure that out, and to do that we need each individual case to be looked at, we need the story from the children and understand that they passed through mexico, on a traumatic journey, where they are exposed to many risks. some were abused and extorted.

some were kidnapped. >> i want to ask you about the risks befores wees go -- before we go. >> sure. >> who needs to step in or up to curb the risks? >> well, those are the risks that the migrants are facing as they pass through mexico. that's one set of risks. we, with the united states, needs to work with the government on those issues. we need to work with partners in central america, to improve security conditions there, and we in the united states need to improve the conditions of the migrants after they are detained, which is another set of issues. etch has responsibility which is -- everyone has responsibilities, and no one can solve the problem on their own. >> thank you christopher. >> thank up. >> in the middle east there's fears of an israeli ground invasion. air assaults continue twine israel and fighters in -- between israel and fighters in gaza. hundreds of rockets have been

fired and more that 70 in the gaza strip have been killed. john hendren reports from gaza city. >> reporter: an ambulance here is never idol for long. sometimes in gaza city there aren't enough. >> where are the ambulances? we need ambulances. >> reporter: by air, land and sea the israeli onslaught rains down striking vehicles, buildings and home. often there's a warning like the one this man got, giving him and his family time to escape. >> i work for an electric company. i was not expecting this. i work all day, i wasn't expecting my house to be hit. nothing is safe on the gaza strip. >> sometimes the israelis don't call first. >> translation: what did these kids do wrong that the house was

hit while they were inside. if the kids are making rockets, the blood is not lost for nothing. it's a shame if it was shed without retaliation. the latest victim, a 2-year-old girl in gaza city's camp. >> for the second time palestinian frog men were killed trying to infiltrate the military base from the sea. >> it was supposed to be a time of celebration. >> normally during ramadan, in the evening, the shops would be open, the sidewalks full of people, the streets full of cars, but now the bombings have shut gaza down. >> now the word on many gazan's lips is invasion. >> it looks like we will face the israelis broadly, not like what is going on now. if they are to invade. it will be the last option. >> with thousands of israeli army reservists called up for duty and tank on the border,

palestinians fear ramadan will begin with an air assault and end with a ground invasion. >> meanwhile, daily life on both sides goes on. now with growing anger and anxiety. al jazeera's nick schifrin is in tel aviv. >> reporter: before this week israelis thought tel aviv was far enough from gaza to be safe. for the first time gaza rockets are reaching telea-viv and this couple's wedding is in range. the camera shows an israeli missile trying to intercept the rockets. they have not been fatal or dammed much, but they are flying further than -- damaged much, but they are flying further. this is intercepted as the bride makes a get away. whenever tel aviv and areas around are attacked, as they

have six times in the last 24 hours is different. tel aviv is the economic capital. this best represents their country and that's why israel takes more seriously an attack here than anywhere else. the city is the symbol of the modern israeli state and a couple's love. there might be rockets, there might be air raid sirens, but nothing could stop this couple getting married today. are you guys scared? >> translation: it's a bit nerve-wracking, this period. we are going forward. >> some might call it defiance, others say they are in defile. the wedding goes on -- denial, the wedding goes on because they believe the israeli operation will succeed. >> translation: there'll be newer rocks et cetera and less chaos. >> when i show them the rockets and chaos during the wedding, their faces change dramatically. >> i hope they'll stop the

chaos. >> translation: we hope there'll be quiet on both sides. this is our day. let's celebrate. >> reporter: for this couple the night ended happily. inside of gaza, and across israel, there's not a lot of peace and quiet or celebration. a suspect deputy shot and killed six people surrendered moments ago in texas, he is was trapped in a standoff with police in a houston suburb for three hours. the local sheriff office found two adults and three children shot to death in a home this evening. a child later died at a hospital. deputies say the mass shootings stemmed from a domestic dispute but have not identified the victims or said how they are related to the suspect. new revelations of spying in the u.s. a website founded by the journalist who broke the n.s.a.

leak suggested the american government has been spying on their own citizens - well, their muslim citizens. john terrett talked to one. >> shock and sprays. >> meet fivesal, a rub can working at the homeland security with george w. bush and records show was spy on. >> some in law enforcement or intelligence may have seen them as not being combat ability. >> "the intercept" published by greenwald, said among the articles was a fivesal recap, allowing warrants to be obtained to spy an americans if suspected of terror-related activity. fivesal was not the only high-profile muslim spied on. so was asim, an attorney relating american muslims in

terrorism-related cases from capitol hill. an iranian-american professor at a university and head of center for middle eastern studies. an activist regstering muslim americans to vote, and the executive director of the council for american-islamic organization, the largest muslim civil rights foundation in the country. >> the fact they are targetting muss lum-american activists and lawyers suggests that they are considering political views on who to focus energy on. faisal says he and the four others have led outwardly exemplary lives and hopes to see changes. >> i hope congress or the administration looks at the policies again, and puts in safeguards so things like this don't happen. >> all five deny involvement in terrorism or esbion age

espionage. in response, it was said: dangerous weather hit the north-east for the second night in a row. this after severe storms killed four in new york yesterday. meteorologist kevin corriveau is following it for us. >> no, i'll take you back to yesterday and show you what we were looking at. this is the radar, 28 hours ago. you can see the storms. this is what it looked like in maddison county, new york. david lost his daughter, grand daughter and great granddaughter

in a tornado it was an ef2. winds of 120 miles per hour. the system brought tornados, and wind damage in the area. over 300 reports were picked up in that area. this is what we saw yesterday with the wind damage across the region. 70,000 people lost their power across the area. tonight we saw more thunder storms pushing through. they weren't like ha we saw last night. we had warnings and watches across the region. most of the thunder storms subsided, but we are looking at parts of massachusetts, the last area. tomorrow, things are going to be better. textures are up there -- temperatures will be up there, but relative humidity will be down. things will get better. thank you. in the midwest the swoen

mississippi river is 10 feet above some centers. it has some towns bracing for floods. volunteers have been filling sandbags to keep the river at bay. because some of those cities are out of cash. diane eastabrook has more. >> reporter: generators working nonstop pump the river out of this business. flooding is a problem. >> it's a huge clean-up taking a huge expense to get it out of way. it takes its toll. >> clarksville has been preparing for the flood all week with volunteers and inmates from a prison stamping sandbags. still, the river pushed its way upstreet, forcing businesses to close and causing anxiety which for residents at the apartment building. >> every night you don't speak. i'm sitting there, wide awake. to hear that water may be coming in or not.

>> during last year's flood, the town was able to put up a large concrete barrier running along the river front. but it didn't have the money to do that. it had to rely on donated sandbags. with the city not paying for another temporary concrete wall. some businesses opted for installing their own barriers. tom spent close to $1500 putting up wire baskses around his -- baskets around his home, saying it was worth it. >> after going through it, you learn from your smacks. soon you get -- mistakes. soon you get proficialt at making it -- proticialt at making it work. >> the mississippi was disappearing, but thursday it creeped closer again. >> the mayor says the unpredictability of the river makes it hard to say when the town will return to normal. >> it has its open mind. every flood is different.

every extension. the extent of it is different. >> for a hamlet inviting visitors to touch the mississippi, this is too close for comfort. >> stay tuned. next on al jazeera, half of detroit's residence relies on it. the system is not getting the job done. how the people who need it most are coping. high drama at the world cup. argentina and the netherlands needing penalty kicks to decide a winner. we tell you who moves on to the

finals. in spain, two people were stabbed by the horns of a bull during the running of a bull's festival. a victim is a 32-year-old rider, gored twice in the thigh. ironically he's the thorough of the book how to survive. his injuries were serious, but not life threatening. the other victim is a 35-year-old man from spine, gored in the chest and in serious condition. >> the championship match has been set for the biggest sporting event. the top two teams will go head to head in the one finals. we go to sao paulo with the latest. >> reporter: pure party time for argentinan fans.

cheering, and pandamonium outside the stadium in sao paulo. "i'm super happy", this man says, a message for all argentinan people "we deserve the happiness and deserve to be champions", they have waited a long time to get to this point. argentina fans ecstatic, going to the world cup fine for the first time since 1990. for the dutch, it was close. if there was any consolation it was this, at least it was not 7-1. for brazilians, if things were not getting worse, they did. most of the fans were subdued, the touch for obvious reasons. the brazilians were sad. they wanted to see the rival from argentina lose. hours before kick-off, the hot rivalry on display outside the stadium. >> brazilians dressing up,

hoping support would wield. >> holland is going to win. >> these argentines counting one to seven, mocking brazil for the embarrassing loss 24 hours before. >> do you have any doubt argentina was going to win. this was the only team with the support of the pope. i have no doubt we'll be champions. >> reporter: argentina one win away, made the sweeter that it could happen on the land of their worst football enemy. coming up laura's law. san francisco passes a controversial bill forcing treatment for some mentally ill. plus... >> i have no skin, other than i care about the fact that this drug seems to be helping patients. and fire - why this woman

was given the boot.

good evening, welcome back. this is al jazeera america, i'm morgan radford. treating the mentally ill. a bill passed but patient advocacy group not happy. >> a doctor forced out of a job because of a study she was doing - fired over pot. we'll hear from her. a wild ride - after three delays, the world's tallest water slide is topping the public. -- is opening to the public. president obama is this texas tonight to raise money for democrats, and to push his

multibillion plan to deal with the influx of immigrants coming from central america. president obama led a roundtable with texas leaders, including governor rick perry. there was agreement that the border needs to be beefed up. we went to ask one young migrant why he risked a dangerous journey to america. >> reporter: each reason this soccer field draws the guatemalan players to play and relax. among them minors and women with young children, who entered the u.s. illegally in large numbers. this man is suiting up for his game. the 17-year-old left guatemala on his own two months ago, fleeing gang violence. he asked that his face not be shown because of his undocumented status. >> translation: you were forced to leave because of the criminality and poverty.

there's no jobs, nothing to eat. >> gang members tried to recruit him, he said. >> if you don't accept, they insist and insist. if you still don't, they threaten you. >> the journey took 25 days, including many days and nights riding atop a mexican freight train, called the train of death. so many migrants are killed or maimed on route. that was a risk they were willing to take. back there, they can kill you at any moment. in a horrible way. this way it's my decision. >> he was apprehended at the border, processed and released to the custody of his older brother, who is also undocumented. the obama administration wants nearly $4 billion for more border security and to speed up deportations saying all the unaccompanied minors will be ordered to leave. long-time guatemalan leader says

the deportations could have fatal consequences. >> these kids come fleeing violence. if they are returned, our understanding is that it will be certain death for them. >> the united nations refugee agencies says young migrants coming to the raits should not be -- united states should not be deported. many would face persecution in their home countries and should be given refugee status. they are waiting for u.s. authorities to give them a date to appear in court. to make his case to stay. he has his own version. american dream. >> to live here in peace, to walk the street without fear. maybe i'll go to school and have a professional life. >> freedom from fear, freedom from want and the pursuit of happiness, the same dreams drawing people to the u.s. for

238 years. getting people with mental illnesses the care they need. what if they refuse the help. lawmakers are letting the course force some into treatment and on to medication. jonathan betz is here telling us about that story. what is going on? >> it's up to counties to implement the law. it's controversial that most counties would not touch it. more community debate whether mentally ill people are forced to get help. >> ever since their daughter's death, parents are campaigning for law. the killer refused treatment are for schizophrenia. laura's law allows the law to get involved, ordering patients to get outpatient treatment and medication. the lawmakers have been slow to adopt it. san francisco is only the fourth

of 58 californian counties to pass the law. critics say it's because forcing people into treatment doesn't work. >> it has to be grounded in trusting relationships. when you are working with somebody with a stick behind you or a threat of something that people experience as punishing, you are automatically working from a deficit. >> those campaigning to keep the law out of san francisco say it's regressive and contradicting the freedom. bay area politicians backing the area help the most vulnerable, and provide the families the support they deserve. they say new york has proven outtarnt treatment -- outpatient treatment works. in 1999 kendra's law was enacted, she dived after her killer -- she died after her

killer pushed her in front of a train. he was mentally ill, but not being treated. data shows that the process forcing mentally ill to get help, works. fewer patients were homeless, and the numbers incarcerated dropped. new york and california are among the 45 states letting courts order treatment in certain cases. only five don't allow it. >> patients rites want funding. saying mental health by the courts isn't really care. >> san francisco expects it to be signed into law. the laws will need to be reassessed to see how well they are working. >> thank you for being with us. an alarming report shows american colleges are ignoring the law when it comes to combatting sexual all the. it comes after schools are

expanded vialing laws. the report from a subcommittee is based on 440 colleges. the findings are startling. in the past five years, 41% of schools did not lodge a single sexual assault investigation. 5% report their attack to police. 10% of schools hired coordinators required by law to comply with sexual harassment laws and crimes. the senator commissioned the study. if they are staying they have not had investigations, that means they are in denial or incompetent or not taking the problem seriously. so sometimes finding out that there has been no investigation for sexual assault may appear reassu reassuring. >> the report says one-third of schools claim to train staffers on how to handle sexual assault

claims. 41% let student help process cases, razing private si. two-thirds gave the athletics g department oversight over cases involving athletes. 21% of schools don't provide training, and 31% don't private sexual assault training for students. some schools say they were unaware of legal obligations under title 9 and will post the procedures on the website. most think title 9 applies to equality and sports, but it covers sexual assault as well. the motor city is in the medal of a transportation crisis. half of detroit's residents rely on public transit. the system is struggling to keep up. we have more. >> this is how troy spends his weekday mornings, waiting to catch the bus to his job at a metal plant outside of detroit.

it's 10 o'clock. the shift doesn't start until one. >> if i have to leave this early to make it to work. >> it's a 9 mile trip that should last 45 minutes. it will take three hours. the stories from bus drivers are heard every day. six months ago they took on the job of fixing the bus system. it's the fourth transportation direction in three years. >> my theory is if you fix the little problems you make the system better. >> in a city of 700,000 people, there are 190 working buses. 300 others need repairs. at bus stops in the city, this is what you need, buses that show up late, if at all. if we put up every bus, it wouldn't be enough. >> just about all the people we spoke with tell us they have to

plan their lives around the buses being rate. 65% is the rate for detroit. 85% is the national average. some complained to the city that they lost their jobs because they couldn't get to work at a time. >> the office applied for grants and requested city and federal funds to improve the system, by adding new buses and fixing old ones. he wants to do this by the end of the year. we have to wait and see. wait and see. as for troy sampson, the bus sped past him. >> reporter: how often does this happen do you? >> all the time. >> reporter: he heads to another stop that will drop him a mile away from where he works. you'll walk almost a mile to get to work on time. >> yes. >> reporter: you have to get tired of this?

>> you know, it is tiresome. i have to do what i got to do. i i've got to keep on. that's not going to stop me going to work. this is what we had to go through. it's what thousands of detroiters had to endure, so the city can fix its transit system. despite accusations chinese spied on america, the two economic ties have never been stronger. nationals are snatching up expense i-american real estate. that is good news for sellers. randall pinkston explains. >> wow. >> reporter: new york real estate broker works in one of the hottest markets in america. >> asking price $3.25 million. >> reporter: for a 2-bedroom, 2-bath apartment with 14 foot ceilings and under 800 square feet of interior space.

plus a roof deck. that man says most of his listings sell in the first month. what is the average price range? >> you are looking at the 1-5 million price point. >> reporter: new york is in the midst of a boom, with tight supply, high demand and nose-bleed prices fuelled by chinese nationals taking the lead for foreign buyers. foreign buyers purchased $92 billion in u.s. real states. canadians bout the most. chinese spent the most, shelling out there 22 billion for single family homes. foreign buyers are driving demand for the tallest building in america. 432 park avenue, the starting price for a one bedroom is $7 million. >> going up to $95 million for the top floor.

at the stratos feric prices, american real estate is a bargain. >> the police per square foot in new york city is $1300. that's a good bargain considering the fact that sydney, london are at 2100 a square foot and above. >> reporter: this economist said chinese nationalists are here to stay. >> this is not a quick investment scene. many of the chinese buyers, they want to put some money down into a property and rent it out over time, if they are not using the property themselves. realtors catering to buyers say most don't use mortgages. 99.9% all cash. >> all cash. >> effectively shutting out american buyers. >> if you have an international buyer, and says i can close in two weeks, it puts someone who needs financing at a

disadvantage. economists say they are helping because mortgages are funded by international investors. >> the chinese is one of the major investors that puts money into mortgage-backed securities, but keeping interest rates low for the average americans. >> reporter: most average americans are not looking for places like these. those that are. no matter how low the interest rate, it's not low enough to compete with cash. a controversy at the university of arizona tonight. a prominent marijuana researcher has been fired. the psychiatrist has been studied the effect on patients with post-traumatic stress disorder. so tonight jake ward joins us live from san francisco. good evening to you. always a pleasure to have you with us. first off, what was the researcher trying to do, exactly? >> well, good evening. the thing to understand here is that marijuana is very difficult

to study here in the united states. you need special permission to be exempt from federal law. that includes from the d.e.a., national institute on drug abuse and a public health review, which is complicated. traditionally to get that you have to open reply promise to study negative things, either the abuse potential or how dangerous it is to drive whilst stoned. what made this so landmark is the doctor at the university of arizona was going to study the tlerp puttic -- therapeutic benefits, and the fact she got permission is amazing. now, the thing is she ended up getting into trouble with the university of arizona. here is what she had to say about the sort of trouble that began at that point. >> the university of arizona has never conducted marijuana research on campus, where we

stored the study drug and administered it to patients on campus. that will be the tricky thing. the problem is the word marijuana is so politically radioactive that i think university administration are concerned about how do they manage this, plus the public relations nightmare of trying to persuade the lawmakers that this is not a drug den here. >> now, the thing here is that the dr was fired by the university of arizona abruptly. here is an interesting side bar. they had settled on the place where the veterans would be administered marijuana. it was basically a back alley. the university of arizona is a sprawling university, this is what they had to mind for these p.t.s.d. afflicted vets. it's a bad sign, the location that is was chosen. >> they have a back alley set

up. if the doctor had government approval. why did the school object to the study. >> while we were - first of all, the university has no comment, saying they do not comment on personnel issues, but i listened in on a conversation that the doctor had with university officials about where the study would go, what her plans were, and university officials worried that doing the research on the college campus would put the university at odds with lawmakers who controlled the budget. other states like colorado and washington were throwing the arms wide in arizona, it's a toxic subject. >> jake ward, joining us live from the west coast. >> a study on heart and health says there's ways to counter harmful effects. according to studies published an hour of exercise can offset the effect of sitting for six to

seven hours, and regardless of how much someone exercises sitting for prolonged periods hurt their health. so, joining us to discuss this is dr debbie of n.y.u. stds medical center. thank you for being with us. why is sitting so bad. we are sitting? >> exactly. >> it goes against on assumes that we had in the past. we used to think people who exercised were protected. or if you sat a lot, it meant you didn't exercise at all. we realise that they are two separate things that we are looking at. sitting can affect a lot of different things in the body. it might affect the muscles. if they were not used, it may change the way you control your blood sugar, the way you control inflammation, all the different things that can set you up for heart disease and diabetes. >> to get that straight, there's a difference between sitting and not working out.

>> exactly. if you sit and work out. you may have problems. the idea is that if you exercise or protect your heart, making your lungs stronger or doing different things that can be protective. if you are sitting for a long time. if you are working out you can develop problems, because you have changes in the muscle in terms of different hormones, you may change the way the cholesterol is managed. a lot of difference things can be affected. >> when you say exercise, what do you mean? how much are we talking about? >> the recommendations vary. most say you should do about 2.5 hours of moderates exercise per week, and 1.15 of intense exercise. 50% of people can get that done. it's what we aim for. you can do it in 10 minute increments, so it's not all at once. the important thing is to reach the level. the thing about the study that is is they are looking to see

what makes the bigger difference, how does it work with each other. it may not be possible for people to not sit, depending on the jobs. >> a lot of us are trapped to the desk. we are in front of the computers, sitting talking to people like you. what can we do during the work day? >> during the week there are different things you can do. you can stand while you make phone calls or have meetings. you can get up. move around during the day. use the stairs. for this study, the key things is they look at an hour and how it balances out six to seven hours. they look at healthy people, not people who had medical problems, in healthy people who are sick, who can participate in the study. it looked like it balanced out. for people with other problems, it might be harder. >> how reliable is this if it has the caveat. is it something that can be trusted? >> it can be trusted but we

can't draw conclusions. they are looking at a specific group of people. they are looking at - it's an observal study, looking at people doing what they would normally do. >> if you test a new drug, you want to give a group of patients a drug and see what happens. in this case they didn't make people exercise or sit down. they let them do what they were doing and watched them. you can't sell which came first - people sitting a lot don't - they develop problems or because they are developing problems they sit a lot. you are making me nervous. i'll is have to get up and do a stretch. >> nice to see you. >> you as well. our image of the day is coming up next. and a ride so extreme they named it insane. hear from the people behind the tallest water slide.

>> i couldn't get around on my own >> a miraculous bionic eye... >> i'm seeing flashes >> great >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america.

we are watching storms across the north-east, and storms across the south-west. as you can see, the storms have been popping up with the heating of the day. these are the monsoonal storms, causing a bit of problems in terms of flooding. we do have a lot of flooding in parts of arizona. look at the storms, earlier in the day, problems there. low-lying areas, a lot of flash flood potential across the region, these are the warnings in effect. the greens, they are dealing with flood warnings and flash flood warnings, talking about

colorado, utah. nevada, and california, and arizona. this continues through the night as we see moisture pumped in. across much of the south-east. we look at the thunder storms. here across the south, we are seeing them go through florida, they are beginning to pick up as they make their way towards makin, they are severe. we'll see a cool down for atlanta. if you want to say 82 is cooler. savannah on the coast. up to the north, we are seeing better weather, storms across nebraska. that's a look at the weather, the news is next.

check this out.

the world's tallest water slide opens in kansas, it's higher than niagra falls and the statute of liberty. we speak to someone at the water park. >> the water slide means insane in german. it's 158 feet, seven inches tall. the process involves sandbags going down, as they are done, and how every weight affects the slide, we doned down the people -- send down the people. we have test riders, with the manufacturer, and test with operations. we do a bit of testing on these things, with radar guns, accelerometers. if you are afraid of heights, this will not be your waterslide. you sit on the table. when it toilets down, all of a sudden, you are facing down. it feels like you are in a free

fall. i know if you see the profile, the profile does not look like it is that deep, but it is. it feels like a free fall when you go down there. it's over so quick, you are obvious the moment, so quickly that you start to go on about the second hill. that's when your mind starts working "oh, my gosh, i'm on the water slide." water slashing everywhere. the reaction of anyone riding it for the first time is wow, that was a maizing. in my case it's can i go again. we hoped to build it in the first or last season. it took another additional year. it's because it's a one of a kind ride. it has to be created from scratch. there were problems. it's interesting, what works with roller coasters doesn't necessarily work the same way. when you add water, it changes a

lot of things. now it's tested and ready to rock. >> waterslide officially opens tomorrow. finally stoont the frieze frame -- tonight the freeze frame comes from california where pieces of history is about to hit the auction block. jock little field collected tanks and vehicles that saw combat from world war ii through to desert storm. he passed away in 2009 and more than 100 pieces will be auctioned off this weekend. i'm morgan radford. thank you for watching.

on"america tonight" - a critical health alert for millions of american women. a routine surgical procedure that 100,000 have each year, and cancer. >> the magnitude of this is not small. this is probably going to be a global epidemic na statement of claiming 4 cancers of -- of stage 4 cancer of women caused by doctors. a beginning with a simply diagnosis of common