hillary clinton's presidential road trip rolls into a key voting state as she vies for the democratic nomination. meanwhile, marco rubio throws his hat into the ring saying he's the future and hillary is the past. iraq's prime minister asking for more help in the battle against isis. and another fatal police shooting in the u.s. a black suspect killed and a white police officer charged with manslaughter. welcome our viewers in the united states and all around the world. glad to be with you. >> this is cnn news room.

>> clinton's two-day mystery road trip has now come to an end, arriving in the state of iowa where she'll hold her first official campaign event on tuesday. a small roundtable with students and educators all part of the pitch that she can relate to ordinary americans. >> and during her trip she stopped for lunch. she wasn't looking much like a presidential candidate. >> you can see in the footage, here she is wearing dark glasses ordering a chicken burrito bowl. she's almost unrecognizable. >> not long after her sunday video announcement, a small secret service detail hopped into a van and hit the road. clinton is calling it scooby.

>> meanwhile, republican senator marco rubio had a bit more of a traditional launch on monday. marco rubio took shots at clinton calling her a candidate from yesterday and casting himself as the man who will take america forward into the future. >> we take a look at what rubio brings to the 2016 presidential race. >> 43-year-old marco rubio tried to turn his youth and relative inexperience compared to older candidates into a plus by saying time and time again in his announcement speech that this should be a time for a generation l change. that the candidates of yesterday are just that, and that there needs to be somebody for tomorrow. at one point it was clear he was specifically talking about democrat hillary clinton. but in another, alluding to

republican jeb bush by, some people are telling rubio to wait his turn. he feels now is his time. we are hearing some mutual friends are saying just that to him, that they wish he wouldn't run right now, that there is a generational difference that benefits jeb bush. rubio talked a lot about his personal history, his family history, the fact that he comes from cuban exiles. and the fact that he has an american dream story that drives his world view as a hawk on the world stage and also here in the united states, his kert ideals, small government and lower taxes. the question, of course, just like the other two republican freshman senators who announced before him, whether or not their youth and inexperience is too reminisce san antonio for some republicans of president obama.

>> marco rubio's strong point is certainly his story. much barack obama, rubio doesn't have that much experience. i ask how rubio can defend himself against his critics. >> by pointing back to barack obama, he can say, look, it's not a barrier to great service that you can be elevated to the presidency even if you don't have a lot of experience. in part because his story is so compelling. we also do have a history, and it's a fond memory for many older voters of john f. kennedy, who had very little experience in the senate as a matter of fact. who was young, in his 40s and extraordinarily popular. there seems to be something with american voters where they will sort of grant you, because you have a great story, a great deal of credibility or trust in a way

that wouldn't necessarily be true for other candidates. >> people run for president for all types of reasons. mitt romney used the 2008 election to set himself up and really went for it in 2012. do you think marco rubio is in it to win it or using 2016 as a way to introduce himself to american voters and then in, say, four to eight years, really go for it? >> as you correctly suggest, the republican habit of taking the first runnerup and making them the nominee four years later is a consolation prize that really nobody wants, honestly. there's too much money involved. there's too much either. in this case, marco rubio is giving up a relatively safe senate seat. what political power he does have he's really putting at risk. he's already confirmed he's not going to run for president and

his senate seat at the same time. he runs the risk of being out in the cold. >> i want to touch on hillary clinton quickly because she is sort of trying to december operately avoid the perception that she's some kind of political messiah that's going to be handed the nomination. do you think that strategy is going to work for her? >> hillary clinton doesn't do humble very well. right now, she's on a bus tour into the heart land of the country. she's only meeting with small groups. that actually does work well for her. the reality is, though, you can't talk to 300 million people ten at a time. it's not going to work very well. she's, i think, trying to sort of pace herself, maybe get into it a little bit below the radar, try to connect with people, become a different kind of campaigner. she is not the kind of campaigner who is going to fill stadiums and talk to 20,000 people at a time. she's trying something that's

relatively new for a clinton and really new for a front runner in a presidential campaign. >> further proof that hillary clinton's presidential run this time is very different from 2008. check out the error page at hillary clinton.com. this is where users are redirected. it's a family photo, yes, from the '80s with donald duck. it's another sign that mrs. clinton wants to remind everyone that she's a wife and mother and wore really bad clothes in the 1980s. there is politics too over in britain, releasing its manifest toe laying out what it's going to do. >> that's right. the labor leader focused on cutting the deficit and ensuring voters his party can be trusted when it comes to the economy. >> the other party of sums that do not add up and commitments

that will not be kept. we are a party that will keep our commitments and every promise we make is paid for. that is the difference between the labor party and the conservative party. >> labor is in a neck and neck race with prime minister david cameron's conservative party. he plans to release the conservative manifesto on tuesday. security contractors have each received long prison sentences in the u.s. their roles in the baghdad mats sa kerr. the men, all u.s. military veterans working as civilians. 17 iraqis were killed. the fbi found 14 of the deaths were unjustfied. one contractor was sentenced to life in prison. the others received 30 years. iraq's prime minister will use his first visit to the united states to ask for more

help to battle isis. he's set to meet with president obama on tuesday. he told reporters he'll ask for more air support as well adds arms delivery. >> he also wants help stopping the smuggling of oil and antiquities. and the militants are pushing back against iraqi forces ons a number of fronts as well. >> the u.s. already provided some help. washington has concerns about the country's sectarian divisions. >> isis is striking back and hard. this youtube video posted over the weekend by isis shows thick plumes of black smoke rising from the oil refinery, the country's largest. the refinery had been under government control for months. isis in a statement posted online, claims to have broken through the refineries outer defenses after deploying a sd

bomber and attacking from multiple sides. in this picture, said to be of their command and control center, a glimpse of the technology used to direct their military operations. also over the weekend, watched multiple assaults. taking over three towns north of the capital of ramadi sending residents fleeing on foot toward safer ground in the city. in another area, not far from baghdad, iraqi security forces and local fighters battled for hours to keep isis from advancing. but without more troops and weapons, they won't be able to hold isis off for long. tikrit might be back in government control, but other fronts are faltering. dispelling any notion that the terrorist organization was significantly weakened by the loss of tikrit. it is against this chaotic battle field backdrop that the

iraqi prime minister heads to washington, key on his agenda, more military support from the united states. >> number one is a marked increase in the air campaign and delivery of arms. this is vital. there has been increase. that's very noticeable. i'm thankful for that. but we want to see more. >> the u.s. has long been uncomfortable with iraq's relationship with iran, a country that has also played a vital role in iraq's war with isis. they also face the challenge of alleviating america's concerns. >> yes, i agree there has been some concerns. there's concerns not only iraq, the whole region. there are concerns in the medaling of affairing in the whole country. iraq is enable lg country to iran. some countries they have their own problem with iran. we ask them not to throw their own problems on us. >> a tough sell as iraq has long

been a proxy battleground. they're going to have to somehow align. they can defeat isis, but not alone. cnn, baghdad. >> and isis' agenda also includes the destruction of iraqi and syrian cultural heritage sites as well. they release add propaganda video of an ancient city. they can be seen attacking the archaeological site using sledgehammers before they finally blow it up. it was a city in 900 to 612 b.c. and the united nations says it's doing all it can to help civilians trapped by isis in syria. the u.n. agency responsible says it has supplied urgent aid on

monday to about 500 civilians who fled the camp. an estimated 18,000 refugees are still trapped inside. a human rights organization says isis and another militant group control about 90% of the camp. a draft resolution goes before the u.n. security council on tuesday to impose sanctions and an arms embargo on the houthi rebels who now control much of yemen. >> meanwhile, saudi-led air strikes are hammering houthi targets in yemen, but they're also under fire from al qaeda militants. more were killed in a bomb attack on houthi military truck on sunday. the saudi military is also fighting the rebels on the ground, but also from its side of the border as well. >> that could change if talk of a ground insurgence turns into action. we have the latest on that from

the saudi/yemeni border. >> more cameras than tanks. for the first time since air strikes began, saudi arabia's army is giving access to journalists. for local reporters, the army is a point of national pride. big guns banging out big shells into yemen. for now, this army standing back to fight. we don't have orders to move forward. right now we're in a defensive position. we don't have any order to go on the offensive for now. >> when it comes to sustaining the fight, saudi arabia has deep pockets. it's the world's third largest defense spender behind the united states and china according to the institute of strategic studidies, it spends 10% of gdp on defense. the desert kingdom has more than

400,000 servicemen, 225,000 in the army, 125,000 national guard, 30,000 each in the navy and air force, but it's still looking for partners to bolster its coalition. pakistan recently declined a request for troops. on the front lines we visited, looking down onto shot up yemeni villages, a long, drawn outfit is looming. they say they can't tell who's a fighter and who's a civilian. they say, they all dress the same. >> translator: we face threats from armed groups. they use small vehicles mounted with guns. in these mountains, they are hard to reach. >> on the mount tops, more fire power is being used and it seems often. fresh shell casings litter the

ground by this machine gunner. his responsibility, as far as he can see. but this is a long border. 800 kilometers, 600 miles. summer and its scorching heat is coming. and as yet, no sign the enemy is ready to quit. cnn from the saudi/yemen border. >> and while russia might veto that u.n. resolution against the iranian backed houthis, it might also give some direct military help to iran. >> it is a move that the u.s. is concerned about. here's our jim sciutto with more. >> those powerful russian surface-to-air missiles may soon be in the hands of iran. moscow lifting its ban on selling the missiles to tehran. u.s. officials responded quickly with alarm. secretary of state john kerry

raising it with his russian counterpart. >> russia understands that the united states takes very seriously the safety and security of our alleys in the region. if this sort of arrangement were to move forward, it would raise serious concerns and could potentially raise sanctions concerns. >> russia is a partner to the nuclear talks with iran. however, washington and its allies fear that iran could use the missiles to shield nuclear sites from potential air strikes if negotiations fail. and above eastern europe, another high-flying u.s./russia encounter. this time as a russian fighter jet intercept add u.s. reconnaissance plane. it was flying over the sea in international air space when a russian fighter flew so close, says the pentagon, as the quote, flagrantly disregard

international safety and professionalism. they say it's a calculated test of the american response. >> they're going to see what kind of professionalism the pilots have. they're posturing to show strength. they're attempting, i think, right now to intimidate eastern european countries. they're show boating for the russian public and they're also doing it because they can right now. no one's stopping them. >> thanks to jim sciutto reporting from washington. we'll take a short break. new details emerging about the reserve deputy who is now facing charges for killing an unarmed black man in oklahoma. that's up next. >> plus, hundreds of nigerian school girls still missing one year after islamic militants kidnapped them. ahead, we'll have the latest effort to get them back. >> and later this hour, a 13-year-old expressing the pain of refugees in a song she wrote

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new details emerged in the

controversial shooting involving police in the u.s. state of oklahoma. robert bates will face second-degree manslaughter charges after killing a black man, he says he accidentally fired his gun instead of his taser. >> he's a white reserve deputy who worked as a full-time police officer police officer just one year and that was decades ago. >> just moments before he was shot -- >> i'm sorry. i'm sorry. >> eric harris was captured on surveillance video appearing to sell a 9 millimeter semi-automatic pistol and ammunition to an undercover sheriff's deputy. moments later, harris spots a swarm of undercover agents and runs. a deputy tackles harris. that's when 73-year-old reserve deputy robert bates shouts that

he'll use his taser. but the tulsa county sheriff's office says bates instead grabbed his gun and pulled the trigger. >> [ bleep ]. >> he shot him, he shot him! >> oh, my god. >> he shot me. he shot me! [ bleep ]. >> do you hear me? >> oh, god. he shot me, man! oh, my god. >> even as he lay dying, the officers taunt him. >> i'm losing my breath. >> a retired police officer named jim clark was brought in to review the fatal incident. >> in times of crisis, sometimes train something not going to take you through the scenario. >> with the video released,

questions turned to why bates, an unpaid certified reserve deputy was on the scene in such a sensitive and high-risk situation. >> mr. bates lacked really any kind of training. he had been a tulsa police officer from 1965 for one year and never passed his probationary period. >> they say he was given the rights due to his long-standing support of the sheriff's department. >> you've heard the sheriff's department say, like any other officer could do, but he could do it with no training. and he could do it just with total access. carte blanche freedom to do what he wants to do. that's incredibly dangerous to a community. >> a sheriff's department spokesman tells cnn that it still stands by the deputy's actions. but the d.a.'s office makes it

clear they feel differently. charging bates with second-degree manslaughter. >> two new pieces of audio have emerged from a deadly shooting in another state, this time south carolina. and a warning, the video here, it's disturbing. >> former north charleston police officer michael slager and charged with murder after an eyewitness captured this video of him shooting walter scott, hitting him in the back five times. here's a recording of slager and another officer right after the shooting. and a portion of the phone call between slager and a woman we believe to be his wife. >> wait a couple days, it will be official, sit down and see what happens. when you get home, probably a good idea to jot down your thoughts about whatever happened, once the adrenaline

stomps pumping. >> hey, yeah, everything's okay, okay? i just shot somebody. yeah, everything's okay. he grabbed my taser. >> also, fired for excessive force for another taser incident captured on dash cam video in august of 2014. that was during a traffic stop. a second man also plans to file a lawsuit for a taser incident involving slager again. this time back in 2013. quick break. when we come back, it has of course been a year to the day since boko haram kidnapped more than 200 school girls. now, we have a new report that details more of the horrors facing the country's children. also ahead, mars is wildly believed to have an arid land skap.

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and welcome back, everybody, wherever you may be in the united states or around the world. you're watching cnn newsroom. that means it's time for your headlines. the u.s. senator marco rubio is the third major republican to announce he's running for president. he's casting himself as a forwa forward-looking candidate while saying hillary clinton is from the past. the former secretary of state declared her candidacy sunday and just arrived in iowa where

she will hold small came pain events tuesday. iraq's prime minister is scheduled to meet with u.s. president obama in washington on tuesday. about a third of iraq is currently under isis control. the u.n. security council will vote tuesday on possible sanctions and an arms embargo against houthi rebels in yemen. they now control much of the territory. but the draft resolution could face a veto from russia. it has been one year since boko haram kidnapped more than 200 school girls in nigeria. it's just one of many tragedies on an epic scale across the region. >> the report says that around 800,000 nigerian children have been displaced by the violence caused by boko haram. they say many have fled to

neighboring countries with little humanitarian support. and the mass kidnapping inspired the "bring back our girls" campaign. niger nigeria's new president vows to make every effort to free the girls. >> 57 of the girls did manage to escape, but the fate of the rest is still unknown. we spoke with one of the campaign's leaders about their frustration. >> how does it make you feel sitting here one year on? >> there's no closure. there's no closure. 219 young women that went to be educated cannot simply vanish into the atmosphere and then the whole world just moves on. when as a matter of fact, terrorists did show that they are with our girls. no, there's no closure. >> how do you feel sitting here?

>> very, very angry. a week ago, i was so angry nothing anybody said to me received a calm response. i would snap. my husband understood why i was snapping. because i didn't think that for one year. >> very emotional. in our next hour, a cnn investigation undercovers new evidence of child trafficking in nigeria, plus, a man has been on social media every single day for the last year holding up a sign with a hash tag #bringbackourgirls. schools in sierra leone are

reopening tuesday for the first time in about eight months. >> they were scheduled to reopen march 30th, but the date was pushed back because of a spike in new cases of the virus. some of the schools were used as ebola treatment centers. five chinese feminists are out of jail, but not quite free from the communist party's grip. plus, one more indication that there might actually be water on mars. we'll tell you the latest coming up. stay with us.

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>> water on mars. >> the name of the song. it was a perkt segway for what we're going to talk about. there's been a lot of talk that there is in fact water on mars. now the rover has made an interesting discovery that there is water there right now, but it's water, but not as we know it. >> absolutely. jst like you said, we've seen pretty clear evidence that water existed, things that certainly would indicate that water was there in abundance millions of years ago. take a look at the perspective here. this is found in southern utah. >> i thought you got it from mars. >> it has iron oxide. i can kind of show you some of the images. >> don't let it go. >> some of the images that we have. nasa went out to southern utah and analyzed this. this is the mars rover up there.

you see the tracks of the rover. they looked at these. they looked at this particular image and put it in perspective that water processes are the only known way that water gave it this shape. what they found in the new study here -- the report coming out on monday showing you the conditions across mars. we know moisture is prevent lealent there. the martian sunset, the graphics looking like this. this is looking at the sunset, eerily similar to what you would see on the surface of the earth. some dust in the atmosphere. moisture in the atmosphere as well. this particular rover analyzed the humidity and the air temperature for one full martian year. the observation there is once the sun sets, the moisture content, up to 100% humidity in

the autumn and winter months, that settles down towards the martian soil. because of the high salt content, it is able to keep a liquid form. now, nasa is saying there's a high potential for lick wad brine at the surface. the salt keeps the temperature much lower. that water evaporates once again. that is the fascinating discovery. you look at the rover there that digs the core samples out of the surface of mars and analyzes the temperatures. the max temperature made it up to minus 5 celsius, cooled off to minus 78 sell just, about 100 degrees below zero fahrenheit. very chilly. but the salt content and the particular type of salt is able to keep that liquid form. >> this is actually getting quite exciting. >> it is. >> the rover is actually sending

back to earth and all this. >> they're saying because the salt content is so high one thing they have to watch carefully is the structures. it's a highly corrosive salt. >> good to know. >> thank you. well, china has released five feminists from jail after international outrage over their detention. >> they took the women into custody last month before protests they had planned for international women's day. prosecutors had until yesterday to charge the women or let them go. >> although the activists are now out of jail, they will be dealing with a lot of tough restrictions. i want to turn to our david mckinzie live for us in beijing. these women are going to be enduring a lot of scrutiny. they're going to be monitored by police for at least a year. what happens to their cause now?

>> that's a very good question. in fact, this case sparked global outrage, from leaders and the secretary of state from the u.s., john kerry. for more than a month they were held in prison, but now they've been freed. but it's freedom with a catch. they're leading feminists in china, five young trail blazers, detained for 37 days. now one of their lawyers tells cnn that the five have been released under strict bail conditions, their every movement monitored for a year. they were picked up last month just before international women's day where they planned to do outreach like this, campaigning against sexual harassment on public transport. they were swiftly put into detention. they were brought here to the

detention center outside beijing. they were there without charge for more than a month. they campaigned to stop domestic violence, for more public toilets for women. one lawyer says she thought they were safe. she was totally unprepared, he says. going on social media with the free the five hash tag campaign. and the likes of hillary clinton who called it inexcusable. they say the journal sovereignty should be respected saying china is a country ruled by law. of course people will feel afraid, he says, because women's rights is among the most politically correct issues in china. now even those who took that up ended up in jail. now out of jail, but not free from the grip of the communist

party. they've called this an encouraging breakthrough, but says that all possible charges should be dropped against these women. we did just get off the phone with out of their lawyers who says the way these women were treated and the fact they're in this legal limbo still after 30 days, he called it the backwardness of the legal system here in china. >> all right. we'll keep an eye on it. thank you so much. we appreciate it. we'll stay in china. the latest fast and furious film has roared into china's record books. grossing a record $68 billion. big dollars in china. $800 million worldwide in less than two weeks. and life imitates art in beijing, a high speed road race left this lamborghini completely

demolished. he was reportedly street racing just hours before the movie debuted. one driver was injured and three other cars were damaged. >> just ahead, a 13-year-old expresses the pain of refugees in a song she wrote herself. ♪ ♪ had fire in their eyes hey, girl. is it crazy that your soccer trophy is talking to you right now? it kinda is. it's as crazy as you not rolling over your old 401k. cue the horns... just harness the confidence it took you to win me and call td ameritrade's rollover consultants. they'll help with the hassle by guiding you through the whole process step by step. and they'll even call your old provider. it's easy. even she could do it. whatever, janet. for all the confidence you need td ameritrade. you got this.

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♪ ♪ had fire in their eyes ♪ and nothing but darkness followed behind ♪ ♪ and now all i can do is -- >> that beautiful, touching song you're just listening to is called" invisible." it debuted in los angeles. it's all about walking in the shoes of dar if you remember ref employees. >> it won the inaugural speak up, spinning out contest

sponsored by the grammy museum. what is truly remarkable, it was written and performed by jade rhodes. she's just 13. ♪ and i know you can see me, but why do you avert your eyes ♪ ♪ and i know you can hear me ♪ you ignore my cries ♪ i am here, invisible, enduring all this pain ♪ ♪ and -- >> just saw that clip, joins us now from los angeles. congratulations on your success and the song. >> thank you. >> tell me, why did you choose to sing about that crisis? what do you know about what's been going on there with the war that's been ongoing for more than a decade now? >> i learned about it last year and i really felt passionate about it. it's just terrible what's been

doing on there and i wanted to write about it to raise more awareness. >> this is about invisible people being seen, especially the kids and refugees. how does a teenage girl living los angeles identify with that? >> it's really hard for me to comprehend what's going on there. a few months ago i read this book of poetry and it really helped personalize that issue for me. ♪ and i know you can see me, but why do you avert your eyes ♪ ♪ and i know you can hear me, you try to ignore my cries ♪ >> and what do you want people to take away from this song once they hear it? >> i mean, it's an issue that's been going on for a while and

it's awful and affected a lot of people. and i just want people to -- you know, i want everyone to just see these invisible people because they deserve to be seen. >> you wrote the lyrics. you also wrote the music for all of this. did that take a lot of time? and i guess was it emotional for you to try and get those words together? >> it was really emotional just trying to put myself in those shoes and just thinking about it. ♪ i'm nothing to them, not even a name on a list ♪ ♪ i'm just another bug that they have to squish ♪ >> and it took me a couple weeks to write it because i started and i wrote -- i wrote the versus and it took me quite a while to write the chorus because i was having a lot of trouble trying to figure out what i wanted people to take away from it. >> when you performed this song,

there were some pretty big names in the audience. what was it like to perform in front of greats of the music industry? >> it was incredible. it was such a humbling experience. i was really nervous when i first got there and did my sound check. but then jackson brown came and helped me with my mic and everybody made me feel really at ease. >> you got this incredible standing ovation. you walked away the winner from this contest. so what comes next for you now? >> i mean, i'm just going to keep practicing and writing and just keep loving music and, you know, see where that goes. >> it's a great song. and again, congratulations. >> thank you. >> we wish you all the very best. thanks for speaking with us. >> thank you for having me. ♪ i am herein visible, enduring all this pain ♪ ♪ and you have made me

invisible, and i need to be seen ♪ ♪ i need to be seen [ applause ] >> she's an incredible kid. >> gosh, it's hard not to be completely still when you hear those lyrics. can't wait to see what she becomes 1e7b, 651 years from now. some real monkey business afoot at a zoo. it seems the zoo was hoping to shoot video of its chimps by putting a go pro camera on the drone, but apparently nobody asked the chimps if that was okay. apparently it wasn't. >> once it hit the ground, they crowded around to see what they'd actually done. i suspect they did. that was the end result.

chimp one, drone zero. >> pretty cool shots there. >> yeah. so there we have it. the chimps win out. angry chimps. >> angry indeed. thank you very much for watching us this hour. >> we are back with another hour of cnn newsroom. you're watching cnn. ♪ ♪ had fire in their eyes ♪ and nothing -- denver international is one of the busiest airports

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a white volunteer police officer now charged with manslaughter after shooting and killing a black suspect in a sting operation. plus, senator marco rubio is officially running for u.s. president claiming he is the candidate of the future. and a year ago today, nearly 300 school girls abducted at gunpoint by boko haram and no one has yet brought them back. want to welcome our viewers in the united states and all around the world. >> great to have you with us for this second hour. and this is cnn newsroom. and we begin with