this is bbc world news, the headlines... the chinese parliament has voted to abolish term limits on the presidency, a move which will allow the present incumbent and indefinite run in office. us officials have backed president trump's decision to meet the north korean leader. the cia director and the treasury secretary said the united states was making no concessions ahead of the summit. colombians have been voting in congratulating in which for the first time, a former rebel group is fielding candidates. as part of the peace accord the party is guaranteed ten out of 280 seats. and the superhero film that panther has now taken more than $1 billion at cinemas worldwide. the film has been praised as game changing for having a largely black cast and a black director. clive myrie will be here with a

round—up of the news just after ten o'clock. first it is this weeks edition of our world. it has been called the world's largest open prison. the gaza strip. penned in by walls, barbed wire and gun turrets. the 1.8 million people living here can only get into israel with special permission. and even if their lives depend on it, they have to enter through here — the erez crossing, the main gateway into israel. this is the story of the desperate choices people have to make. it's the story of how the israeli

state seeks to protect its citizens. i wouldn't rule out that 9,000 people are still alive, they don't even know that they were about to be killed. and of those who now live tortured by shame and regret. this is a film about palestinians who collaborate with the israeli state. those who would work for the enemy. in may 2017, the ruling hamas government in gaza released this video to a shocked public. some palestinian men

had apparently been caught working for israel in gaza. they were explaining how they were recruited. each had been cleverly targeted according to their needs and beliefs. they were then recruited by israeli agents to kill a senior leader of the hamas military wing, a man called mazen fuqaha. fuqaha was one of those behind a series of bombings in 2002, in a controversial

prisoner exchange in 2011. mahmoud is one of the founders of hamas. he had known fuqaha for years. but someone seemed to think that fuqaha was still active. ashraf abu laila received his instructions on the 24th of march, 2017. he outlined the plan in the hamas confessional video. hamas officials say that

this is ashraf, caught on cctv as he walks past the hospital, into the yard, and towards his target's parking lot. fuqaha had spent a family day on the beach. he was alone in his car. the gunman followed him, knocked on his window and shot him five times. ashraf‘sjob was done. hamas had lost one of its key assets and there was an outpouring of grief at fuqaha's funeral. soon after, ashraf and his suspected accomplices were arrested. in their confessions, they warned the audience not to fall for israeli recruiters. days after these confessions

were filmed, all three men were executed as traitors and as a warning to others. we cannot verify the testimonies in the video. hamas would not share their evidence. but collaborating with israel is not such a rare thing here. working for israel security forces is a matter of taboo here among palestinians. i'm on my way to a prison to speak to an inmate who knows a lot about this subject. according to prisoners at this gaza jail, a quarter of the inmates are convicted collaborators.

"ibrahim", as i'm calling him, told me that israeli recruiters prey on the needs of people in gaza. the israeli authorities told us they don't try to recruit people in these vulnerable situations. most of those imprisoned here for collaboration have been prosecuted for simply giving information to the israelis. but ashraf, and others convicted for killing mazen fuqaha, went much further.

hamas say they committed murder. what could have made a palestinian like ashraf kill a leading hamas militant? and how might the israeli security forces have found and recruited such a man? the fuqaha murder confession wasn't the first time ashraf was noticed. he was active in the violence that erupted after hamas took power here in 2007. it turns out that ashraf was a member of hamas security forces. he was heavily involved in fighting against hamas opponents. then, back in 2007, he started to adopt more radical views. in 2007, ashraf kidnapped and murdered the owner of a christian bookshop in gaza. when rami ayyad's body was recovered, it was disfigured by multiple stab and gunshot wounds.

ashraf was a brutal killer. i wanted to find somebody who could explain his motivation. jihadists aren't welcomed here by hamas authorities in gaza, but i have managed to contact one of them who is very influential among these circles. i hope he will be able to tell me more about ashraf. did ashraf share his plans with other radicals here? jihadis had been arrested in gaza, and even killed. the hamas authorities have attacked their mosques. was ashraf motivated by revenge? i'm hoping my contact will give me some answers. so, i met him.

he don't want to be filmed. but he told me very interesting stuff. ashraf approached the jihadists, claiming he's a member of the so—called islamic state, but thejihadists rejected him. as a loner, ashraf might have been easier to control. but would the israeli security forces really recruit a jihadi? someone dedicated to the violent destruction of israel? it seemed an extraordinary risk. the seafront in nearby tel aviv feels like a different world from gaza. these swimmers, joggers and holidaymakers seem to take their safety and protection for granted. but i have come to meet a man whose job was to guarantee this protection. forfive years, avi dichter was the director of shin bet, israel's secretive internal security service.

he now heads the foreign affairs and defence committee of the israeli parliament, the knesset. if i ijust take the second intifada during three years, and during those three years, ‘01,'02,'03, we have lost 900 people. mainly civilians. mainly in suicide bombings. in many cases, we've succeeded to foil those terror attacks. so if the number of people that got killed is 900, then i wouldn't rule out that 9,000 people, if not more, are still alive, they don't even know that they were about to be killed. i asked him how easy it was to recruit reliable informers. when you are interested in someone you try to map, what are his skills? what are his weaknesses? but above all, what

are his strengths? otherwise, you don't need him, you can take another one. would you recruit a jihadist to kill a hamas operative? everything is possible in the fight against terrorism. everything. there is one very strong principle in my eyes. i always used to tell it to my people. if you decide to become a terrorist, you better know that the israeli shin bet, military, mossad, police, never mind, any israeli, one way or another, you'll reach your cell in prison, or your grave in the cemetery. in a tel aviv park, i am meeting a reserve officer from israeli military intelligence.

we are protecting his identity, and he has to be careful about what he says, in order to avoid arrest. the role of his unit was to recruit informers among the palestinian population in places like gaza. and that meant mass covert monitoring — phones, e—mail and social media. translation: people's lives are like an open book for us. we know so much about people's personal lives — their romantic affairs, their sexual affairs, their health problems, everything. so, if you want to gain co—operation from people, it's obviously best if we can blackmail this person. in some basic courses on arabic in the unit, you learn specific words, like different synonyms for homosexual in arabic, like "luti".

so you will tell this guy, let's say, for instance, "you are luti," in order to break him. why? that is a possible course of action, yes. you practically put this person in a lose—lose situation. either way, his life is in great risk. but it's notjust sexual orientation that makes people targets. if someone‘s daughter has cancer, for example, and he wants to get treatment in one of the israeli hospitals which is known to have better treatment than palestinian hospitals, and if we know about it, maybe we can stop him and tell him, "ok, you can have this, but only if you co—operate." this woman knows all about this coercion. today, she is with her grandchildren.

a year ago their mother, kholoud, needed urgent treatment for cancer. the israeli authorities granted her permission to go to a hospital injerusalem. it was 6:00am and barely light went she arrived here at the haaretz crossing one morning injanuary 2017 with her daughter. the officers wanted information about a man married to kholoud's cousin. she said he was an olive tree farmer. she says her daughter was not able

to give any information about the man. but the israeli authorities did not allow kholoud to board the bus. three weeks later, kholoud died. the israeli authorities told us that entry to israel is not conditional on providing information or cooperation, and they denied any irregularities in their dealings with kholoud. some palestinians work with israel

because they genuinely believe this is the right way to protect their own people. i have come to a tiny village in the far south of israel. it's the home of a bedouin community of around 20 families that were moved from gaza, where they had devoted their lives to working with the israeli state. hassan is the community leader here, a role he inherited from his father, a bedouin sheikh from the sinai desert. hassan‘s father sided with the israeli state with the israeli state after arab nations were defeated in the 1967 arab—israeli war, and israel

occupied his land. but israeli counter—terror operations have also been far more aggressive. over the last 15 years, more than 300 palestinian militants have been targeted and killed in gaza. how often have collaborators helped in these killings? in a side street in a provincial israeli town, i found someone who might be able to tell me. we have to protect his identity. i could now understand why this man wanted his identity concealed. he told me he had worked in gaza for the israelis from the age of 17. but that was before he had to get out. this bird told me his testimony had ensured many hamas cellmates

remained behind bars for decades, but it has taken its toll. normality, more than anything, is what people in gaza crave. but, for most here, it's out of reach. constant scrutiny, suspicion and human need mean collaboration will keep shaping and poisoning lives, and some will continue to work for the enemy. some sunshine and some rain for the

weekend but the thing we will notice the most is the temperatures edging up. saturday was the warmest day of the year so far but it could be that by next weekend temperatures are going in the opposite direction once again. we will get to that in a moment. the reason things have been turning a bit milder is this area of low pressure to the south—west washing in some mild air northwards across the uk. but it did come with some rain and some showers and it will still do that on monday. bands of wet weather circulating around that area of low pressure, a few brighter spells as well. the north of scotland, mainly cloudy and dry. temperatures have come down a little bit compared with the weekend.

finally, going into tuesday, that area of low pressure pulls away, a ridge of high pressure coming in for tuesday, settling things down. a good deal of cloud around mind you, particularly in eastern parts, and still a bit of rain for a time in the midlands, east anglia and the south—east of england. and temperatures have edged up a little bit, so some spots in scotland for example getting back into double figures. for wednesday, that ridge of high pressure isjust about figures. for wednesday, that ridge of high pressure is just about gone and low pressure parks itself to the south—west of us for the rest of the week. it will have limited attempts on wednesday to bring in a band of wet weather towards the south—west. but more cloud in the west. the most noticeable thing about wednesday will be a strengthening southerly wind. temperatures will be in double figures more widely. the area of low pressure to the south—west will then try to feed a band of cloud and rain

in on thursday, in may not be exactly like this but there will rob lee still be some sunny spells across eastern parts. something a little bit cooler coming in towards the north sea coasts on thursday. 0n friday the low pressure is still trying to feed in cloud and rain north—eastwards. to the south of that, brightening up a bit with a few showers. why is that area of low pressure parking itself to the west of us, not just pressure parking itself to the west of us, notjust coming on through with its wet weather home and look at the big picture and it could be that it at the big picture and it could be thatitis at the big picture and it could be that it is reaching a block in the atmosphere, an area of high pressure in scandinavia. around that, some colder air coming back in but there is some uncertainty about how cold it will be as it comes in next weekend. this latest image is looking like it will be less chilly

than we had thought but still colder than we had thought but still colder than what we have at the moment. so there is still a lot of detail to be decided on next weekend's weather. but the indications are that next weekend or into the start of the following week, something colder will be coming back from the east again. a risk of wintry showers, not guaranteed but more towards the north—east of the uk. we will keep monitoring this as we go through the week. good evening, and welcome to bbc news. in a moment, we'll bejoining viewers on bbc one for a full bulletin of news with clive myrie. but first, up to 500 people in salisbury, who went to the same pub and restaurant as a poisoned former russian spy and his daughter, are being advised to wash their clothes and clean any possessions they handled whilst there. england's chief medical officer, dame sally davies, stressed the risk from the nerve agent was extremely low. people who were either is zizzi's

restau ra nt people who were either is zizzi's restaurant or the mill pub