steve patterson, nbc news, los angeles. >>> when we come back, the benefits of cycling. how for some it is turning back the clock on a debilitating disease. >>> everyone knows exercise is good for us, but cycling is getting some new attention now. turns out it can help relieve the symptoms of parkinson's, a chronic and progressive disease that gets worse as people age. our medical correspondent dr. john torres on a simple and surprising discovery. >> reporter: you would never guess that judd stover has suffered from parkinson's disease for the last seven years, because he doesn't have tremors. he doesn't have muscle stiffness, and his feet don't shuffle when he walks. one big reason he's so active and symptom free? he said yes to a surprising new therapy. >> slow it down even more and better by doing this stuff, where do i sign up? >> reporter: what did he sign up for? a clinical trial using a simple treatment. >> how you feeling? >> feeling good. >> reporter: cycling. researchers at the cleveland clinic are finding cycling is helping patients stop the symptoms of parkin

we will have the latest from steve patterson. >> reporter: tonight terror in the streets of clevelandty wide murder manhunt. >> finding somebody about to kill, about to kill this guy right here. >> reporter: police scouring the streets, searching for a man suspected of life streaming an execution of a man in broad daylight. graphic video streamed on facebook live appears to show the suspect getting out of his car, telling a stranger he's going to die because of a woman. >> sthe's the reason this is about to happen to you. >> reporter: the final frames show the man raising a handgun. shot rings out and then the victim laying in a pool of blood. >> it is real shocking. it is a killer trying to show his power. it is akin to a terrorist beheading video. he is trying to show how powerful he is by broadcasting a murder live. >> reporter: police identify the suspect as steve stevens. on his facebook page, which has been taken off line, stevens claims to have killed up to 15 people. >> i'm going to try to kill as many people as i can over here. >> reporter: he posted a video manifesto about t

the airline was quick to respond as nbc's steve patterson reports. >> reporter: the video is tough to watch. a woman crying holding a screaming child at the front of an american airlines plane headed from san francisco to dallas. the mother of twins and this flight attendant allegedly clashed over bringing a baby stroller on board. what is not on the video, witnesses say the flight attendant ripped the stroller out of her hands striking the woman and nearly striking the child leading to the conflict. on board, a passenger interjects. >> you almost hurt a baby. >> hey, bud. you do that to me and i'll knock you flight. >> stay out of this. >> reporter: sources say the pilot calmed everyone down before taking off, but upon arrival in dallas the flight attendant was suspended. american released a statement saying, what we see on this video does no the reflect our values or how we care for our customers. we are deeply sorry. the passenger upgraded to first class for the next leg of her flight to argentina. a quick response in contrast to how arrival united handled the infamous passenger dr

thank you to steve patterson reporting.e president pence in south korea where he made a visit to the demill tar sized zone. the beginning of his trip where the missile launch exacerbate rising tensions. janice, what is the latest you are hearing? janis mackey frayer. >> reporter: the demilitarized zone dividing the two koreas. could you look into north korea and north korean soldiers were looking back. the visit had had personal meeting to mr. pence. his father a bronze star medal winner for service during the korean war. he says he keeps that medal close to him in his west wing office. but also his entire south korea trip took on new strategic significance over the week end with another missile test by north korea. a medium range missiled from east coast, it faltd. u.s. officials confirming it blew up less than five seconds after the launch. it came hours after a massive military parade went through the streets of pyongyang, kim jong-un presiding over it. missiles, mobile launchers and what experts believe is new weaponry.

steve patterson, nbc news, los angeles. >> when we come back, the benefits of cycling.or some it is turning back the clock on a debilitating disease. i thought i married an italian. my lineage was the vecchios and zuccolis. through ancestry, through dna i found out that i was only 16% italian. he was 34% eastern european. so i went onto ancestry, soon learned that one of our ancestors we thought was italian was eastern european. this is my ancestor who i didn't know about. he looks a little bit like me, yes. ancestry has many paths to discovering your story. get started for free at ancestry.com why pause a spontaneous moment? cialis for daily use treats ed and the urinary symptoms of bph. tell your doctor about your medicines, and ask if your heart is healthy enough for sex. do not take cialis if you take nitrates for chest pain, or adempas® for pulmonary hypertension, as this may cause an unsafe drop in blood pressure. do not drink alcohol in excess. to avoid long-term injury, get medical help right away for an erection lasting more than four hours. if you have a sudde

steve patterson's been watching all the developments for us in our l.a. bureau. do we know? >> kate, there was a recent news briefing a few minutes ago, new information from that as is follows. we know there were four victims involved in this. the shooter known now to be a male, visiting the school, visiting a female teacher inside a single classroom. the other victims were two students. we are now hearing that those two students are in critical condition, both students rushed to the hospital after this apparent murder/suicide shooting within that classroom. we don't know the names. we don't know the ages of those students. but we do know that they are victims involved in this shooting. t the shooter believed to be see ceased. the teacher, female, believed to be deceased as well. students now waiting to be accounted for fully before they are reunited with their parents who do remain on scene at this school shooting. this, again, happened at about 10:30. we're told now from this press conference that this male suspect was somehow involved in visiting this female te

steve patterson, nbc news, oakland, california. >>> up next remembering a man who designed a symbol of equality known throughout the world. >>> a champion of civil rights who broke racial barriers in this country has died. william t. coleman jr. was a lawyer who played a key role in several civil rights cases beginning with brown versus board of education which outallowed segregation in public school. he was appointed secretary of transportation by gerald ford. he served for many years as president and then chairman of the naacp legal chair and fund. president clinton awarded him the presidential medal of freedom in 1995. he was 96 years old. >>> a trailblazer of gay rights has died. gilbert baker was an artist best known for designing the rainbow flag that became a symbol of the lgbtq rights. he became an activist in the community in san francisco where he taught himself to sew making his first flag in 1978. he made a flag that stretched all across key west in florida from the gulf of mexico to the atlantic ocean. he never trademarked his design. he was 65 years old. >>> watching all

nbc's steve patterson has more. >> reporter: the video is tough to watch.historically crying holding a screaming child at the front of an american airlines plane headed from san francisco to dallas. the mother of twins and this flight attendant allegedly clashed over bringing a baby stroller on board. what is not on the video -- witnesses say the flight attendant ripped the stroller out of her hands, striking the woman and nearly striking the child. leading to the conflict. on board, a passenger interje interjects. >> you almost hurt a baby. >> hey, bud, you do that to me i'll knock you flat. >> come on. >> reporter: sources say the pilot calmed everyone down, but upon in dallas, the flight attendant was suspended. american said quote, what we see on this video does not reflect our values or how we care for our customers. we are deeply sorry. the passenger upgraded to first class for the next leg of her flight to argentina. a quick response to how rival united handled the passenger dragging incident. sarah nelson is the head of the country's largest flight

nbc's steve patterson reports what happened there is causing alarm across the country including rightere in the bay area. it sounded like an air raid over dallas. >> that is not a drill. >> reporter: on friday night, all 156 of the city's emergency sirens screaming in unison into the early hours of saturday morning. >> they say the alarms were coming from all over dallas. >> reporter: the cause, not a storm, but a cyber attack, creating fear and confusion, clogging 911 for hours. >> it's like finding a needle in a hey stack. >> reporter: the incident comes after years of warning from the cyber security community about the danger hacking can cause to vital infrastructure. homeland security statistics pinpoint nearly 300 attacks reported on critical systems in 2015 alone. >> certainly those parts of our infrastructure that is readily accessible is vulnerable to these attacks. >> reporter: one of the five most hacked states, texas, according to the tech firm digital guardian, second only to california. where in san francisco, an attack took light rail ticket machines off line during one

steve patterson is there talking to residents about what is next. >> reporter: a quarter century later anger lingers in south los angeles. this community rallying attention to problems like poverty still flplaguing street corners back in 1992. four officers were acquitted for the beating of rodney king caught on camera. the spark that ignited a fire, neighborhoods descended into chaos. in six days over 12,000 arrested, more than 2,000 injured and nearly 60 dead. >> there are fires all over the city. this side is on fire and people are looting over here. >> reporter: this l.a. native was 14. >> you knew that something was terribly wrong when you have that many people angry and upset. >> reporter: she never left, a community voice for neighborhoods still struggling. >> it's a disappointment to see any piece of land in l.a. still vacant especially knowing the needs of the community. that's the real tragedy. >> reporter: in the years that followed signs of hope, investigations into the riots exposed critical flaws in the tactics of the lapd and the department was force in hd to change. >>

steve patterson, nbc news, hollywood. >>> when we come back, an inspiring story that began on the battlefieldded today at the finish line. >>> finally tonight, when they ran the london marathon today, among the more than 40,000 athletes taking part were two men who have formed an unusual bond. they're both former soldiers who know something about a challenge, and that's what brought them together as a two-man running team. the story from tammy lightner in london. >> reporter: for most people, running one marathon is an accomplishment. what about two? on two continents less than a week apart. that's exactly what carl heinent, an injured british soldier, and ivan castro, a blind american vet have done, tethered together by a shoe string, crossing the line at the boston marathon. and six days and one long airplane flight later, completing the london marathon today. >> reporter: who came up with this crazy idea? >> i think this crazy idea was made up by prince harry. >> reporter: that's right, prince harry and ivan castro have known each other since 2013 when the prince trekked to the south pole

we get the latest from steve patterson. >> a city wide manhunt.olice scouring the streets searching for a man suspected of live stream agexecution in broad daylight and telling viewers he's responsible for several more deaths. graphic video streamed on facebook live appears to show the suspect getting out of his car, telling a stranger he's going to die because of a woman. l. >> she's the reason why is this might happen to you. >> reporter: the final frames show the man raising a handgun, a shot rings out and then the victim laying in a pool of blood. >> it's real shocking. it's a killer trying to show his power. >> reporter: police identify the suspect as steve stevens. >> we know who he is. he will eventually be caught. >> reporter: on his facebook page taken offline, stevens claims to have killed up to 15 people. >> i'm going to try to kill as many people as i can over here. >> reporter: city posted a video manifesto about the spree before live streaming the suspected murder. >> it's like i'm always the bad guy. >> reporter: a horrifying new re

. >> steve patterson, thank you. >>> overseas to i think. >> reporter: new concerns about the threatrom north korea of a another provocation from a young dictator lashing out, but this time the missile test failed, blowing up moments after launch. now the question, was american sabotage involved. nbc's janice mackey frayer has all of it covered on the in seoul, south korea. >> reporter: just hours after north korea flaunted its military strength, a fail i had missile test exposed its weakness. the medium range missile blew up less than five seconds after launch. according to the a white house foreign intelligence advisor the white house had good intelligence before and after the test. some suspect whether u.s. sabotage could have factored into the failed launch. >> we don't know yet. it could be sabotage. it could be poor engineering, just bad luck. the that's the nature of these missile programs. it is clear u.s. policy has been to do everything possible. >> reporter: whether or not the u.s. played a role, the failed launch is an embarrassment for kim jong-un and not good for the u.

steve patterson, nbc news, new york. >>> that's nightly news for this saturday. tomorrow, the story of a young athlete and how his remarkable drive helped him overcome the odds. from all of us at nbc news, thanks for watching. good night. here you are. right now -- chaos in berkeley -- as groups in support and against president donald trump -- clash violently. show open ==terry cu== the news starts now. good evening, i'm terry mcsweeney -- peggy is off today. we're on at special time due to >>> i'm terry. peggy is off today. we're on at a special time because of nfl hockey. there was a familiar seen in berkley this afternoon as opposing sides clashed. nbc sky ranger over the scene as groups formed against donald trump sounded off a war of wars. punches were thrown and arrests were made. we got team coverage of the rallies today in berkley. let's begin with nbc christie smith in berkley. >> reporter: terry, right now some demonstrators are in downtown berkley. early on they gathered at civic center. we saw things on free speech and escalated to punches and pepper

nbc's steve patterson has the latest. [ sirens ] >> i got two victims. i got one gunshot victim, one shot to the left side. >> reporter: tonight, an alleged killer couple accused of being at the heart of a one-day wave of terror in the streets of los angeles. >> window shattered. male, female inside vehicle. vehicle last seen eastbound imperial. >> reporter: police say the cross-city shooting spree started saturday afternoon. >> unknown at this time whether or not they were random shootings, they were purpose shootings or whether they were in the car or out of the car. >> reporter: the suspects, a man and a woman considered armed and dangerous, started by carjacking this suv, shooting at cars and pedestrians across several cities across l.a. county, including a victim crossing the street in whittier, a car-to-car assault nearby, and an attack in la merida, where one was killed. >> i heard four shots. >> i heard a loud power play outside my window. >> reporter: he says he was nearly killed when a bullet hit his head rest in the middle of traffic. >> kind

let's get directly to steve patterson who is in our los angeles newsroom. steve? >> reporter: katy, we're getting reports out of the san bernardino police department that there were multiple injuries inside a school in san bernardino. we've been talking to the sheriff's department. they have said this does seem to be a murder-suicide situation. it's on the campus of northpark elementary which is in san bernardino county. the school is on lockdown at this point. they do believe at this point the shooter has been neutralized and the situation there is now safe. but again, this is something that is developing. it's an ongoing situation. what we are hearing about this classroom is that there was someone in the classroom who had a gun and started shooting. two victims were down in that classroom reported to be students. one teacher inside that classroom also down, reported from this shooting. and again, the suspect is reported to be down as well. so again, we have four people who took gunshot wounds, including this possible suspect, inside that classroom. this is an el