fans have more than a hundred prints to examine. what has been more difficult is escher's work finding its rightful place on museum walls. more at aljazeera.com. these images just moments ago. another attack in jerusalem, a person has been stabbed. as police shoot the man they believe to be responsible. the democratic candidates coming out swinging in their first debate. we'll see if what they said was true. i'll in las vegas, taking a closer look at how the housing crisis continues to impact its aging population. ♪

>> this is al jazeera america live from new york city. i'm del walters. hillary clinton and bernie sanders are out complaining once again today, just hours after their big faceoff in las vegas. with only five democrats running, last night's debate, seemed to be on the stage, was empty compared to the republicans crowded debate. clinton and sanders dominating the event. al jazeera spent the night fact checking their answers. >> everybody on this stage has changed a position or two. >> reporter: accused of political expeed densy, hillary clinton tried to revise history at times. clinton now opposed a trade deal progressives hate, even though though she supported the deal as secretary of state. >> did say three years ago that i hoped it would be the gold

standard. it was just finally negotiated last week. and it didn't meet my standards. >> reporter: but in dozens of speeches around the world clinton didn't say anything about hope. >> the tpp will lower barriers, raise standards, and drive long-term growth across the region. >> reporter: on the keystone oil pipeline, another project liberals cannot stand, clinton announced her opposition last week. >> i never took a position on keystone, until i took a position on keystone. >> reporter: but according to government documents, clinton as secretary of state supported the pipeline, and on some occasions she publicly rationalized her support. >> we will either be depenning danth on dirty oil from the gulf, or dirty oil from canada.

>> reporter: bernie sanders was asked about gun control. years ago he supported a bill to protect gun manufacturers from lawsuits. >> shield the gun companies from lawsuits or not? >> let's begin by understanding that bernie sanders has a d-minus voting rating from the nra. >> do you want to shield gun companies from lawsuits or not? >> this was a large and complicated bill. >> reporter: it was, but the fact is as a member of the house, sandered voted for the bill protection of lawful commerce in arms about. the law protects gun manufacturers from lawsuits, a protection that does not extend to most other product manufacturers. sanders and clinton both promoted their efforts to reign in wall street. >> my plan is more comprehensive and frankly tougher. >> clinton just said her policy is tougher than yours. >> well, that's not true.

>> reporter: on that point, sanders is correct. wall street firms have said repeatedly they fear the sanders plans far more than clintons, partly because the vermont senator would break up the biggest banks. final debate moderator asked hillary clinton about her email controversy. >> there is an fbi investigation, and president obama said this is a legitimate issue. >> i never said it wasn't legitimate i said i answered all of the questions. >> reporter: but she has not explained how her server was set up and whether she did anything to protect it from hacking. all together the five candidates on stage produced more than 20 questionable claims. iran's guardian council approving the nuclear deal between the u.s. tehran and five other world powers. that is the final step for the government. iran is expected to begin next

week removing thousands of centrifuges in exchange for the lifting of sanctions. u.s. and russia defense officials are expected to meet again today to talk and syria. >> we're not able at this time to associate ourselves more broadly with russia's approach in syria because it is wrong headed, and strategically short sided. and that is because it attempts to fight extremism while not also at the same time working to promote the political transition. >> defense secretary ash carter saying the pentagon will not be working with moscow to carry out air campaigns, but he says the two countries are close to air safety in the area.

and today iran is denying reports that its troops have joined forces with the syrian government. zana hoda has more from beirut. >> reporter: iran's official line is that they have no troops ground forces in syria. we know iran is a key ally of the syrian government, providing much-needed military and financial support. and iran doesn't shy away from the fact that they have military advisors on the ground. they announced one of its top generals was killed in the aleppo province. but now we are hearing reports from sources close to the iranians, more than one source in fact, and they are reporting that iranian ground forces are taking part in ground offensives in syria. we know there are major ground operations underway. these sources and the reports that they have been leaking are

talking about -- are providing detailed information about operational plans on the ground, which, you know, this being very forthcoming with all of this information really poses a lot of questions, and they have been forthcoming with this information since the start of the military intervention in syria. so some analysts are saying iran wants to give a message to the world, that they are there, we have always been in syria, our role has not been sidelined, and they will have a say in the future of syria or in any negotiations to reach a political solution. what is clear is that pro-iranian sources are talking about thousands of ground forces in syria, and they are talking about major ground operations to try to change the balance of power on the ground, the balance no one really had the upper hand, but as of late, the syrian

government was feeling threatened in two front lines, really, on the coast, as well as in the province of aleppo. >> zana hoda reporting. isil leaders releasing a new audio message yesterday, encouraging followers to launch a holy war against russia and the united states. president obama said to be rethinking the number of troops that remain in afghanistan. innocent gone has been planning to reduce the number of u.s. troops to about a thousand by 2017. coming up, a court reinstating that lawsuit challenging a controversial new york police program, surveillance of muslims not accused of any crimes.

♪ we are following developing news coming out of israel. just moments ago, israeli police shot a palestinian man that they say attacked a woman there, this happening near a bus station in jerusalem, and on a day of protest over increased military presence across the country. andrew simmons is live from jerusalem. what do we know about the this latest attack? >> reporter: well, any hope that these new security measures, the announcement that these security

measures would have a profound effect have been shattered. this is the scene of chaos right now at the bus station. police say that a man entered the bus station and actually attacked a woman with a knife. there was a scene of confusion, and the police intercepted this man and shot him dead. he actually -- he fell amongst a crowd, and then another man, we have seen video of this, was suspected by the crowd as being another accomplice, and they tried to beat him up, the police actually managed to resolve that issue. this came hours after a youth was shot dead in occupied east jerusalem. he apparently, according to the police, was actually searched,

and produced a knife. that's what the police say. there is video of this incident, the latter part of the incident, where he is seen running away, and apparently shot as he was running away, in the back. that appears to be the case. there's been no explanation from the police on the exact circumstances of this. and independent verification of any of these attacks is hard to find. highly controversial with palestinians who are accusing the police of underhand tactics in dealing with these incidents, del. >> andrew how are the people in jerusalem reacting to the stepped up military presence that we're hearing so much about? >> reporter: well, it's a pretty divided situation here in that no one is really reassured that this crisis is over. there may be some psychological assurance with the site of

troops accompanying police in cities now. however, not everyone feels that way. they feel this is an escalation of the situation, and won't have a deterring effect. a lot of other measures are to be enacted such as sealing off areas in east jerusalem where security forces believe there are situations of tension. they will seal off areas at a moment's notice. they have the power to do that. and more measures against what are termed terrorists by the government in that there is already a demolition policy on their homes, and now they won't be returning the bodies of fenners. >> andrew as always thank you very much. here at home defunding

planned parenthood emerging as a huge issue for democrats hopefuls. >> it is all the republicans or their sympathizers who say you can't have paid leave, you can't provide health care, they don't find having big government to interfere with a woman's right to choose and to try to take down planned parenthood. they are fine with big government then. >> now planned parenthood is changing the policy that drew anger from republicans and launched the campaign to defund the group. >> reporter: planned parenthood has been under attack for months over allegations its accepted payments for providing fetal tissue for medical search. these undercover videos tried to make that case.

anti-abortion groups claimed the videos showed planned parenthood making a profit off of fetal tissue. >> they were harvesting little hearts, little lungs, little livers for cost. >> reporter: planned parenthood said the videos were misleadingly edited and denied receiving payments beyond reimbursement costs. now it says it will no longer receive that reimbursement. the president wrote: richards was grilled last month about the controversy during a hearing on capitol hill. republicans are trying to defund the women's healthcare provider. >> why do you need federal dollars? you are making a ton of dough. >> we don't make any profit off of federal money. it is unacceptable that in the

21st century women in america are routinely harassed for accessing a legal medical procedure. >> reporter: the group that released the videos called planned parenthood's policy change an admission of guilt. and the chairman of the house committee said: the organization is now the focus of five different congressional investigations and numerous state inquiries. ines far ray, al jazeera. the controversial police surveillance of muslims in new york once again facing legal scrutiny. a court ruling that muslim americans who were being watched for more than a decade can now sue the nypd. >> reporter: it was created after the september 11th attacks. the nypd called it the demographics unit, and from 2003

to 2014, it kept secret surveillance of muslim americans. angry new york muslims filed a series of lawsuits against the department, but they were thrown out. now a federal appeals court has reinstated the case. the judge wrote, quote: 20 months ago, this federal judge dismissed the case ruling the surveillance program was designed to stop attacks, not to target muslims. and then police chief ray kelly offered this defense of the program at the time. >> we intend to continue to do the things that we believe we have to do to protect new york city, certainly the number one terrorist target in this

country. >> reporter: the demographics unit was disbanded in 2014. police have admitted the program never generated a lead. three environmental groups are suing the forest service accusing them of breaking federal law over the necessarily water permit. alleging the agency allowed the company's brand to pump water out of the forest for 27 years without reviewing or renewing the permit. the backdrop for last night's debate were the bright lights of the las vegas strip. but that's not the real way of life for people who live there. especially this retirement communities. >> reporter: paul came to las vegas prepared to retire and live a life of leisure. then the financial crisis hit. >> i bought the house at the

peak, close to 400,000, and now the house is worth maybe 250. >> reporter: now he needs help, especially for his wife who has alzheimer's. he drops her off at this day care center every day. >> it has been rough. it has been -- i don't know how to say it. it has been very hard. >> reporter: las vegas gambled big on real estate and lost. up ending the retirement plans of many residents. >> folks who planned for their retirement for their later years and moved here from other states for the warm wonderful weather and the low cost of living, and then found themselves going under when the economy crashed. >> and exhale. >> reporter: the number of seniors who found themselves needing help, caught the state by surprise. according to one cdc study, the demand for assisted living is higher in nevada than the

national average. this is just one of the few facilities in the entire state that takes care of the rapidly raging population. it helps about 1,000 people. but there are 350,000 seniors in the state. fred is 72 years old. he tried working at a wal-mart a while ago, now he is a senior helping other seniors, volunteering and receiving a stipend of $2.65 an hour. >> it helps out. >> reporter: aarp's local chapter stays busy trying to place seniors in a variety of jobs. retirement takes decades of planning, and for so many people who made las vegas their destination, it wasn't supposed to play out this way. the economy has picked up, but

not enough to change these lives. remember those days of slow internet connections? it is still very well for many people in the u.s. and why this picture purchased for about $2, could be worth 5 million.

leaders from the air traffic controllers union say a shortage

of controllers has reached crisis levels. officials saying that the federal aviation administration not meeting its hiring goals for the past five years, but safety is not at risk. the faa shares the frustration with those staffing levels. and faa is without warning about lithium ion batteries. the batteries have been linked to fires on board flights. there is a battle over the internet, and it is effects as many as 22 million people. one such battle taking place in chattanooga, tennessee. jake ward went to the cyber front lines. >> house was your day at school? >> reporter: penny is a middle school teacher and mother of two with no access to brood band. they have two choices, dial-up,

or satellite internet. which she says can't reliable. >> the internet we use is just using our data on our cell phones. >> reporter: she says she has been waiting for years for broadband to come to her area, she is not alone. 53% of americans living in rural areas, don't have access to basic broadband. the reason comcast or other providers aren't there, is because it costs a lot of money, and the revenue is not very high. but one company does want to bring the internet here. epb, that's chattanooga's local utility which provided ul ta high speed service. and the company has fiber infrastructure that ends just half a mile from where the family lives. >> we can serve those and make a financial business model work out of serving some of those areas, and can do it fairly quickly. >> reporter: david is the chief information officer at epb.

the company is willing to invest $60 million to extend service, but it can't because of an existing state law. >> it's certainly about retaining service rights and service territories and reducing competition to be honest. >> reporter: and so epb and the city of chattanooga filed a petition asking the state law be overturned, charging that the law limits competition. wilson, north carolina filed a similar request. >> the laws that we challenged were the product of lobbying by industry and persuasion of members of the legislatures. >> reporter: jim bailer is lead counsel. >> the laws are sometimes said to be for the purpose of

creating a level playing field, for the purpose of creating fair competition, but in reality, are to create barriers that the established carriers can't comply with in most cases. >> reporter: in february the fcc agreed and overturned tennessee state law. >> the federal government is preempting a state from preempting cities. the attorney general filed an appeal saying quote: >> right now in tennessee because of that, there's no competition. there's no choice. there's no service. >> reporter: janice is a proponent of municipal broadband but says changing the law is a challenge because of lobbyists. >> they hold tremendous power, and there have been efforted to

eliminate this problem in a few areas of tennessee. each time tremendous dollars have gone in to lobbyists to defeat it. very few things have been able to get past it. >> reporter: she will propose legislation in 2016 to strike the clause from tennessee law that prohibits municipal broadband from expanding into rural areas. >> it is an infrastructure problem that has been exacerbated by a political problem. if you have a government protected entity that has a virtual monopoly, the last time i looked that up, with that's called crony capitalism, and that is not what good government is about. >> and finally, a california collector may have instruct gold after uncovering this photo. he purchased this image at a secondhand store, and paised about $2 for it. that man with the croquet mallet is actually billy the kid. this would be the second confirmed image of the outlaw.

estimated to be worth about $5 million. thanks for joining us. the news continues from london next. >> a come is stabbed at a bus stop in jerusalem despite the sweeping security measures designed to prevent such attacks. good to have you along. russia's jets pound positions in syria as reports emerge of iranian troops on the ground bolstering assad's forces. taking to the streets in south africa protesters call for an end to corruption.