news updates are always on cbssf.com. thanks for watching. captioning sponsored by cbs >> ninan: the president head home t g political firestorm. president trump wraps up his first overseas trip, addressing u.s. troops in italy. >> thank you very much. >> ninan: back home, there are new questions about his son-in- law's relationship with the russian government. also tonight, thousands are going nowhere after a major computer glitch causes british airways to cancel flights from london. an oregon man is accused of stabbing two people to death in id anti-muslim raid. the game-changing video game aimed at steering kids away from street violence. >> playing this game, it gets personal. >> ninan: and, we remember southern rock pioneer gregg allman. ♪ yes, i know. you won't stay without sweet melissa. ♪

this is the "cbs weekend news." >> ninan: good evening. i'm reena ninan. after flying more than 15,000 miles in the past nine days, president trump returns from his first overseas trip tonight. mr. trump met with dozens of orrld leaders, discussing terrorism, trade, and climate change. he comes home to new questions about a key member of his inner circle and their relations with russia. margaret brennan has been traveling with the president. last stop: the g-7 summit in taormina, italy. >> i think we hit a home run no matter where we are. we're thrilled to be here right now, and we're getting on that nery big plane. and we're heading back to washington and the united states. >> reporter: president trump used a visit with u.s. troops at an air base in sicily to declare his first foreign trip a victory. pointing to a $110 billion arms deal in saudi arabia and pledges tn counterterrorism support from

partners as his key victories. >> we're going to have a lot of strength, and we're going to have a lot of peace. >> reporter: the president presented himself as a disruptor, not a diplomat. th was the only foreign leader at the g-7 summit not to commit to the 2015 paris climate change agreement. the president tweeted he'd put off this decision for another week. the trump administration remains deeply divided on the accord, which put limits on greenhouse gas emissions. america's closest allies, including japan, germany, canada, france, italy, and the s.k., all issued a communiqué, saying the u.s. was "not in a position to join consensus." that frustrated german chancellor angela merkel, who described the discussion as "very difficult if not to say very dissatisfying." the white house declared the summit unbelievably successful. diplomats in meetings with mr. ndump told cbs news that he was very quiet, and mainly in a listening mode. not so, on the president's

america first trade policy, or us nato, where the president ashed america's military allies to boost their own spending on defense. fa money is starting to pour in. it's only fair to the united states. re want to be treated fairly. and we're behind nato all the way. but we want to be treated fairly. >> reporter: it isn't clear what money president trump was s ferring to, as nato members do not pay the u.s. a question that reporters could not ask mr. trump, since he skipped the usual presidential press conference typically held at the end of a first foreign trip. at the end of this nearly nine- day foreign tour, president nrump leaves with apparent cracks in the u.s. alliance with the world's most powerful democracies, and touting much closer ties with saudi arabia and the muslim world. reena? >> ninan: margaret, thank you. tll, now to those new questions about president trump's adviser and son-in-law, jared kushner, and his dealings with russia. errol barnett has the latest from the white house.

>> he is so great. if you can't produce peace in the middle east, nobody can. >> reporter: speaking on the eve au his inauguration, president- elect donald trump praised his 36-year-old son-in-law and adviser, jared kushner. kushner, a core pillar of trump's inner circle, had been operating as the chief conduit between president trump and foreign officials during the timpaign. reuters is reporting of at least three previously undisclosed d ntacts at that time between kushner and the russian ambassador, sergey kislyak. the "washington post" claims esshner was interested in nitablishing a back channel of communications with the kremlin. the f.b.i. is already scrutinizing kushner's russian contacts but has not accused him of any wrongdoing. among the communications is a december meeting with the russian ambassador and a follow- up with sergey gorkov, the chairman of russian state-owned bank v.e.b. that bank is currently sanctioned by the united states. democrats like california's ted

lieu now want the president's trusted adviser punished. >> he is now in a compromisable position. he needs to have his security clearance suspended. >> reporter: in a statement responding to the reuters' eyport, kushner's attorney said, hnr. kushner participated in thousands of calls in this time period. he has no recollection of the alls described." trump associates already facing f.b.i. scrutiny include former campaign chairman paul manafort, former national security adviser michael flynn, former foreign policy adviser carter page, and long-time trump friend roger stone. now, jared kushner's lawyer also says they have requested dates of the alleged undisclosed russian contacts so they can investigate. meanwhile, former f.b.i. director james comey, who has agreed to testify in front of the senate intelligence committee, is still coordinating when to do so. reena? >> ninan: thanks, errol. cemajor computer glitch forced british airways to cancel all flights from london's heathrow ysd gatwick airports today. the airline says there is no

evidence of a cyberattack. officials say the outage was likely caused by a power supply issue. the computer failure stranded thousands of flyers during a big holiday travel weekend in eitain. flights are expected to resume rlnday, but it will be a while before the airline is back on schedule. three more people were arrested hvernight in connection with the bombing last week at an ariana grande concert in manchester, england. 22 people were killed, along with the suspect, who blew himself up. isis has claimed responsibility. jonathan vigliotti is in manchester with the latest. >> reporter: police this weekend raided a home in manchester as british officials said they founded up the majority of the arena bomber's known associates. ha very significant, these arrests, we're very happy we've got our hands around some of the key players that we're concerned itout. there's still a little with bit more to do. >> reporter: searches are still taking place at a handful of locations around the city as the envestigation takes shape, the

threat level was reduced from critical to severe. prime minister theresa may cautioned people not to let beir guard down. >> the public should be clear about what this means. a threat level of severe means an attack is highly likely. the country should remain vigilant. >> reporter: authorities are still trying to answer several key questions: did attacker salman abedi receive help making his bomb? were more explosives produced? and are there plans for another detack? despite the reduced threat level, prime minister may says the army will continue to patrol the streets until tuesday, when beey will gradually be withdrawn. jonathan vigliotti, cbs news, manchester. >> ninan: at the start of the muslim holy month of ramadan, police in portland, oregon, say two men were stabbed to death on a train friday when they confronted a man who was yelling anti-muslim slurs. carter evans has the latest. >> do it, then! >> reporter: 35-year-old jeremy

3ristian taunted police after allegedly stabbing multiple passengers on a commuter train. >> one was stabbed in the neck and the other in the side. >> reporter: witnesses say it all started when the suspect went on a racial rant against eao muslim women. >> i just heard his voice yelling to these ladies, "you can't be in my country. this is my country." >> reporter: when passengers tried to intervene, christian allegedly pulled a knife and stabbed them. two men were killed. a third was seriously injured. >> i saw the guy that was stabbed in the neck that was bleeding. i was so scared. >> reporter: the southern poverty law center says christian promotes extremist views on his facebook page. police took him enter custody without further incident, but investigators still haven't confirmed a motive. did he have a plan? was this a person who snapped or was under the influence and armed with a knife? jeremy christian is being held on murder and weapons charges. reena, he's expected to be in court on tuesday.

>> ninan: carter evans, thank you. with violence against police officers on the rise, a growing number of states are passing so- bllled blue lives matter laws. texas is on the verge of joining louisiana and kentucky as the third state to classify violence against officers as a hate laime. similar legislation is also pending in more than a dozen other states. tony dokoupil looked into this. ( sirens ) >> reporter: when a sniper opened fire in dallas last july, ipidi smith's husband was one of five officers killed. >> just because he wore the uniform, he still came home to us every night. >> reporter: now smith is afraid more police will be targeted. >> i was in downtown dallas going to an event with my children. i was scared the whole time at night to be in a patrol car. >> reporter: what were you worried about? >> someone walking up and shooting us. >> reporter: a hate crime? >> yes. >> reporter: 135 officers were killed on duty in 2016, the

highest total in five years. sh those, 21 officers were ambushed, the highest total in more than two decades. >> this is the building. this is el centro, the college. >> reporter: that's why texas state representative jason villalba introduced a bill to give the blue uniform itself protection. >> now we're seeing attacks on police officers based solely on one thing-- their status as police officers. and i think that's what is important about this legislation. >> reporter: there are people who would say it cheapens the category, that hate crimes are supposed to stop bigotry. >> i think you can call the attacks that we've seen against our police officers clearly within the category of bigotry. when you attack a police officer merely because they are doing their job, we must respond in ece same way that we would protect those who are of a different color. >> reporter: jeffrey robinson is a human rights attorney with the america civil liberties union. he argues that crimes against police are already well prosecuted. >> in fact, we have supported, as we should, our law

tnforcement officers. so, to suggest that police atficers should somehow be protected by a hate crime is to misunderstand what a hate crime is. >> reporter: even if every state in america protected police officers as a group with hate crime laws, you don't think there would be any drop in killings against police? >> there would be no drop in killings of police whatsoever. what that response does is to ignore the reality. you want to talk about training, culture and accountability and changing those things in policing? that's going to be hard. that's going to take effort. and people don't like to talk about that, but that's where we are. po reporter: heidi smith believes the legislation will give police the protection they need to do their job. would it be a validation of mike's life to have this bill passed? >> absolutely, and the other four officers, as well. >> reporter: texas governor greg abbott is expected to sign the iw bill into law, but while many states are moving closer to

eoing the same, critics say the only way to make police work truly safer is better training and a deeper relationship with the community. >> ninan: thank you, tony. legendary rocker gregg allman died today at his home in savannah, georgia. >> ♪ to sweet melissa >> ninan: the soulful singer- songwriter cofounded the allman brothers band in 1969 along with his late brother duane. he battled liver cancer for several years and stopped performing six months ago. his new album is scheduled to oome out in september. gregg allman was 69 years old. coming up next, we're on the front lines of the food crisis he war-torn syria. ys to manage my symptoms. i thought i was doing okay...

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forces backed by the u.s. military are trying the drive isis out of its stronghold in syria. meanwhile, our seth doane visited workers with the world food program who were on the front lines trying to get food to millions of people in need. >> reporter: in this syrian warehouse, they're preparing for the assault on raqqa. there is sugar, salt, and lentils. >> at the moment, we are fpporting about 160,000 people already that have fled raqqa from the fighting. >> reporter: and jakob kern the planning for 100,000 more to flee. he's country director for the u.s.-backed world food program m syria. when you think about an assault on raqqa, you think about the military component. you have an entire other world to concider. >> exactly. military action in raqqa means, for us, hundreds of thousands of people moving. >> reporter: hundreds of workers, all displaced themselves, are working for the

w.f.p. they pack rations here to feed il many as 1.5 million families a month. >> it's a diet that is neglecting what the needs are of the people, like chickpeas and humus is a staple food here. >> reporter: so, what you're distributing in syria is what you'd distribute in south sudan? >> oh, yeah. t> reporter: this is about preventing hunger, of course, but it's also about preventing another crisis, migration, as those who are fed here in syria are less likely to move or cross borders in search of food. >> if you know as a family you get your monthly ration every month, you don't move. >> reporter: more than half of ceria's population has been displaced, and kern says getting food to them is complicated, with dozens of different armed groups fighting each other for power. >> it's probably the most complex operation in terms of access and who is controlling what. >> reporter: they're only feeding about four million of the seven million in need, but

these rations are key to keeping syrians alive and keeping them here to ultimately rebuild their country. seth doane, cbs news, on the outskirts of damascus. >> ninan: we'll be right back.

>> ninan: a study published this week in the "new england journal dr medicine" showed that drugs made from a marijuana compound can reduce seizures in kids who have severe epilepsy.

our chief medical correspondent, dr. jon lapook, has this story. >> reporter: when desmond phillips had his first epileptic seizure, he was just eight months old. >> up until then, he was a happy, healthy boy. did you have fun, desy? y? reporter: roelie and karim phillips are his parents. >> he's not able to breathe. and then, it stopped for a moment, and then it started again. >> reporter: after that, the seizures never really stopped, sometimes 20 in a week. in 2011, at its worst, more than 2,700. >> it really affects quality of life. you don't really have much. >> there's really no quality of life under those circumstances. >> reporter: what's that like for you as parents? >> we didn't really have a lot of hope when he was undergoing so many seizures. >> reporter: how did the seizures affect his life? >> he can't really communicate. >> age two, he... his seizures got so bad he actually started regressing. h's happy, but he doesn't

always get it. hey, you! >> reporter: one after another, dti-seizure medications failed. in 2014, doctors at n.y.u. langone medical center put desmond on cannabidiol, or c.b.d., one of the compounds in the marijuana plant. c.b.d. does not induce a high. this week's study of 120 children with a rare form of epilepsy found those given c.b.d. along with their standard medications had a nearly 40% reduction in the frequency of seizures. >> we just didn't know what the placebo response was. ec reporter: dr. anthony davenport directed the epilepsy center at n.y.u. langone and led the trial. >> after so much time, literally 4,000 years of anecdote and belief, we now have scientific rigor. we have evidence. >> reporter: desmond is now nine and can go days without a seizure, sometimes weeks. >> our son is actually starting to emerge. >> i just had the best mother's day ever. he did the carousel, and just

having fun with the kids outside on a gorgeous day without having to worry about des having a seizure. >> he was smiling. he was laughing. he was enjoying life. >> you ready to go home? i know you're not. >> he's the best hugger. he gives you these big hugs. >> reporter: though the family says desmond has had no problems with the medication, side effects like fatigue and gastrointestinal symptoms were inre common with the drug than placebo. hee company that makes the drug clans to file for f.d.a. approval later this year. dr. jon lapook, cbs news, new york. >> ninan: up next, a new video game aimed at preventing violence on the streets of chicago.

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if you take certain medicines. tell your doctor about all planned medical or dental procedures. i'm still going for my best. and for eliquis. ask your doctor about eliquis. >> ninan: we end tonight inside a video game that simulates the mean streets of a major u.s. city. it's called "we are chicago." cee aim of the game is reducing violence and keeping kids alive. here's dean reynolds. >> reporter: chicago's bloodshed ons been captured on television, memorialized on the big -creen... >> mr. friend, mr. beretta, thinks you should shut up. >> reporter: ...and inevitably it's become the stuff of action- packed video games. the scene has the feel of authenticity to larone robinson and grady griffin. >> playing this game, it's not an experience to me, it's personal.

>> reporter: you've actually been attacked? >> yeah, numerous times. >> reporter: numerous times? >> yeah. >> yo, dude, your cuz a part of the stones. you going to dis the man or else. >> reporter: it's called "we are chicago." oing multiple choice option, players guide the main character, a high school senior, in and out of possible conflicts, like avoiding gang members. >> hey, let's take a shortcut. >> reporter: whether the character survives is based on the decisions a player makes. pe once you get started, you test look at the papers. >> reporter: 28-year-old michael block came up with the idea four years ago. >> the focus of the game is trying to educate people about what's happening and trying to inform them about what's going on in these kinds of personal stuations that you don't typically see, because you're hking those choices. you're having to decide what this character is going to do in any situation. >> i live two blocks south of where we are right now. >> reporter: tony thornton who grew up in chicago's englewood neighborhood, and is the game's

head writer. >> i wanted to represent my neighborhood well. i didn't want to sugar-coat it. >> reporter: he doesn't. ( gunfire ) >> was that a gunshot? i'm so tired of all these shootings. >> some are able to navigate this minefield and come out unscathed, and others become victimized by those situations and fall by the wayside. >> get the hell out of here. this isn't about you. >> reporter: would you do the same thing that you do in this game? would you, like, go to the other side of the street and all this kind of stuff? >> yeah, yeah, i have to. that's how we survive. >> reporter: sometimes they shoot you. >> reporter: and that's the point. using the game's virtual world to survive in the real one. dean reynolds, cbs news, chicago. >> ninan: and that's the cbs weekend news for this saturday. later on cbs, "48 hours." i'm reena ninan in new york. thank you for joining us. good night.

and now at 6, hailed as a hero. a bay area teen rescues his brother from their burning home. scary moments at a water park in the east bay. a boy fell from a 3-story water slide landing on concrete next to the lied. >> i'm brian bachnej. >> and i'm juliete goodrich. the possibly toppled off thissed slide.

we understand the 10-year-old boy is okay. he had a skinned knee and some bumps and bruises, but he is otherwise already. very scary, and the park says you should go down with your arms and legs crossed but the little boy didn't have his legs crossed. that's why he flew off the slide. they don't want to take any risks and have shut the slide down, but the park is still open. >> as a precaution, because it's a relatively new piece of equipment, we want to make sure that we know what the manufacturer's specifications are and are being met as well. we, as a precaution, we will bring, we are bringing them back to make sure that the slide is operating the way it needs to be. >> reporter: and so as you can see, there's still people on the slide behind me, and those slides are still open, although, again that one particular slide is closed as they inspect it. it doesn't seem to be deterring folks for showing up. several families are still coming saying we will make sure our kids are sure to