>> tracy morgan critically injured. a truck driver face multiple charms for a deadly accident vinita nair has the latest on morgan's condition. california chrome is minutes away from trying to become the first triple crown winner in 36 years. alexis christoforous is at the belmont stakes. the u.s. navy rescues nearly 300 migrants from overloded boats in the mediterranean. alan pizzey has that story. and he ain't heavy. see why this 14-year-old is carrying his younger brother on his back for 40 miles. >> i really just wanted to do something for him. captioning sponsored by cbs this is the "cbs evening news."

>> good evening, i'm jim axelrod. the prosecutor in new brunswick, new jersey, is charging a truck driver with death by auto. just after 1:00 this morning, tracy morgan was airlifted from the keep of the accident on the new jersey turnpike just north of trenton. he was on his way home from performing when his limo was hit from behind by a tractor trailer. vinita nair picks up the story. >> reporter: police say a trabtor trailer park slammed into the back of morgan's chauffeured limo bus, overturning it and causing a chain reaction that involved six investigation. comedian james mcnair, one of morgan's writers, was killed. four other bus passengers are in critical condition, including morgan, who was taken by helicopter to a hospital in new brunswick, new jersey. his publicist released this statement to cbs news-- "his family is now with him and he is receiving excellent care. we don't anticipate much of a change in his condition today."

morgan was returning from a live performance in delaware, part of a multicity stand-up tour. comedian ardie fuqua who was traveling with morgan posted this photo of the bus about 30 minutes before the accident. he is also in critical condition. "traveled back to nyc in style in a luxury mercedes sprinter. road life is a good life. the. >> reporter: morgan, who began his career doing stand-up on the streets in brook rin is best known for his seven years on "saturday night live" and his lead role in the comedy "30 rock." >> live every week like a shark week. >> reporter: this past april, he appeared on "cbs this morning" to faulk about his new comedy tour. >> reporter: how could you feel up there on the stage by yourself? >> it's exhilarating. there's nothing in the world like live entertainment. >> reporter: the 45-year-old actor also spoke about his family. he has three grown sphrons a previous relationship, and a one-year-old daughter with fiance megan wollover.

>> that's my baby. that's my girl. she has given me a different perspective on being a dad so i see things a little bit different, you know. i have a beautiful baby daughter, you know, and i also have a shotgun, a shovel and alibi. >> reporter: wal-mart owners the tractor trailer involved in the accident. in a statement the company's c.e.o. bill simon said he was praying for the victims and if" it's determined our truck caused the accident wal-mart will take full responsibility." >> we could be less than half an hour way from horse history tonight. california chrome will lead the field of 11 horses entered in the belmont stakes and try to become the first thoroughbred in 36 years to win the triple crown. alexis christoforous is at belmont park. >> reporter: there are 120,000 fans on the edges of their seats right now. you came all the way from california to see this today. >> absolutely. >> reporter: why? >> would not have missed it for the world.

i have never within so excited for a triple crown winner. it's a legendary story. >> reporter: the three-year-old chestnut colt has won fans' hearts and won six straight races at the reins of jockey victor espinoza, including the kentucky derby and the preakness. now only a miefl and a half remains between them and racing a triple crown victory. longtime track announcer tom durkin. >> probably the most exciting moment in all of sports, all of sports is when a horse comes too the top of the stretch at belmont park way triple crown on the line. >> it's my cinderella story. it's our dream come true. >> reporter: also in the stands, chrome's co-owners, steve and carolyn coburn of nevada, who bred the colt for a bargain $10,000, unheard of in professional horse racing. >> i knew he was going to do big things. when he won the kentucky derby i knew he could go and win the

triple crown. >> reporter: coburn has strict instructions from his trainer to wear the cowboy hat and boots he's been known for. >> he said don't change nothing. i'll be wearing the same outfit i wore at the kentucky derby, preakness stakes and i'll be wearing it at the belmont cfkes. >> reporter: 11 horses are heading to the starting game gateshortly. if california chrome wins his owners stand to collect $800,000. win or lose, coburn told me he plans to be back at his day job on tuesday. alexis christoforous, cbs news, belmont park. >> axelrod: there is a surge that's been developing in the number of unaccompanied children crossing the border from mexico into the u.s., and it is creating dire conditions at a makeshift holding center in southern arizona where food, water, and medical supplies are now running low. as jonathan lowe of our phoenix station kpho reports california's governor is putting the blame squarely on the white house. >> reporter: behind this gate

of the u.s. border patrol is a converted warehouse where the children are staying. today there are at least 750 of them living here, ranging in age from three to 18, all of them alone. these are the photos taken of the kids last night, wrapped in marathon runner-type blankets, sleeping in tubs and being monitored by d.h.s. border patrol agents. they shouldn't be here. this facility only houses adulted who cross the border illegally, but in the last 11 days, the department of homeland security says it's been overwhelmed with the flood of children crossing into the rio grande valley in texas. 48,000 just last month. as many as 200 children a day. most are from central america. christa works at baptist child and family services in san antonio. >> these are really good conditions, certainly better than most of the children have come from, and without question better than the conditions in which they traveled here from. >> reporter: d.h.s. says it's trying to fix the problem but right now has nowhere else to

put them. today, some of the children were en route to facilities still being prepared in california, texas, and oklahoma. for those still here, a representative from the federal emergency management agency arrived and is providing health care. arizona governor jan brewer says she is disturbed and outraged that the federal government is implementing what she calls a dangerous and inhumanes policy. d.h.s. has ordered 2,000 mattress fairs building that's only supposed to hold 1500 people. today, the consul general of el salvador said the kids are getting showers and appropriate nutrition. last night, the department of justice announced it is looking for young lawyers and paralegals to provide legal assistance to all of the families. as for the children, that el salvador official says some of them are beginning to mistheir families and get depressed so border patrol agents are creating a play area.

jim. >> axelrod: jonathan lowe of, thank you. we're learning more tonight. a dramatic rescue in the mediterranean sea made by the u.s. navy when one of six boats full of people trying to flee africa and get to europe started to sink. two u.s. navy ships made a bee line for all six boats. hundreds were saved. some had already gone overboard. here's alan pizzey. >> reporter: search-and-rescue helicopters hovered over a disaster in the making. an italian patrol plane spotted six rickety boats jammed with illegal migrants, one of them sinking. the u.s. navy ships bataan and elrod, in the area in case americans needed to escape from libya, came to the rescue. thousands of migrants risk the perilous crossing from north africa to europe every month fleeing poverty, war, and in some cases, persecution, with no idea who their packages wer pas, the u.s. sailors frisked everyone who came on board.

among those saved were a mother and her baby, a sign of just how desperate people are for a new life. for many, the crossing is just another leg of a journey that has taken months and in some cases years. the checkup on the ship would be the first time many of them have had any medical care. the migrants set sail in unsea worthy boats with virtually no safety equipment. for the final leg of the voyage they were put on a real boat way traipped crew and given lifejackets, safe at last. alan pizzey, cbs news, rome. >> axelrod: ukraine's new president poroshenko took the oath of office today. he vowed to take crimea back from russia but did not say how he would do that. in winston-salem, north carolina, today they gathered for a memorial service in which speakers described how god put a rainbow in the clouds. this is the theme as speakers like michelle obama, oprah

winfrey, and bill clinton considered the legacy of maya angelou, died last week at the age of 86. chip reid has more on the celebration of one life that touched so many others. >> when i think about maya angelou, i think about the affirming power of her words. >> reporter: first lady michelle obama said maya angelou's writings first inspired her as a young woman. >> i was struck by how she celebrated black women's beauty like no one had ever dared to before and oh, how desperately black girls needed that message. >> reporter: angelou's words, she said, still give her strength today. >> through long years on the campaign trail where at times my very womanhood was dissected and questioned, for me, that was the power of maya angelou's words. words so powerful that they carried a little black girl from the south side of chicago all

the way to the white house. ( applause ) >> reporter: angelou read one of her poems at bill clinton's first inauguration. >> come. you may stand up on my back and face your distant destiny. >> she had enough experiences for five lifetimes. >> reporter: clinton recalled that archl lou was raped as a young child and refused to speak for five years. >> god loaned her his voice. she had the voice of god. and he decided he wanted it back for a while. >> reporter: oprah winfrey described angelou as her spiller queen mother. >> she was my anchor, so it's hard to describe to you what it means when your anchor shifts. but i realized this morning, i really don't have to fut into word. what i have to do is live it because that's what she would

want. she would want me, you, us to live her legacy. >> reporter: a legacy of words, wisdom, and spirit that has inspired millions. chip reid, cbs news, washington. >> axelrod: later, california's iconic joshua trees under threat from climate change. when the cbs evening news continues. did someone say burn? try alka seltzer reliefchews. they work just as fast and are proven to taste better than tums smoothies assorted fruit. mmm. amazing. yeah, i get that a lot. alka seltzer heartburn reliefchews. enjoy the relief. i always say be the man but wiand a low sex drive,iness, i had to do something. i saw my doctor.

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even in the desert there is such a thing as too hot. at joshua tree national park east of los angeles, the last decade was the hottest on record. and now as danielle nottingham explanation, these stark symbols of the american southwest are beginning to die off. >> reporter: looking like sculptures in the sand, joshua trees are icons of the mojave desert. more than a million of them stand under the blazing southern california sun in joshua tree national park. these trees have survived here because their roots are capable of finding water deep in the diswert ground but there are early indications that rising temperatures and a severe drought have dried out their water source. >> this is one that's probably on its way out. >> reporter: what would joshua tree national park be without the joshua trees. >> it would just be a very different landed scape, a very different feeling. >> scientists like cameron borrows, now mates 90% of the trees in this park could dry out

and die by the end of the searchry. >> warmer is bad because it increases evaporation and it's stressful on the plant itself. >> reporter: is there any way to reverse what's happening? >> if we stopped putting carbon in the atmosphere, that would reverse things. it would take a while. >> reporter: barros' team of researchers have been working for months looking for signs of explf new growth, any clue that the joshua tree has a fighting chance in a warmer world. donna thomas and her grandson elima are volunteer researchers who comb the landscape. >> to think that a couple of generations from now it might not be quite so beautiful makes me also want to contribute to do as much as i can to protect what's here. >> reporter: but scientists do have hope. new trees are growing at higher elevationelevations in cooler temperatures and that could mean they're adapting to climate change. >> this is excellent. we're very excited to find the reproduction that we're finding here. >> reporter: while there is great excitement for each new tree found, there's also a

reality-- the young trees grow only a few inches a year, not fast enough to outpace those lost. danielle nottingham, cbs news, joshua tree national park. >> axelrod: up next, the tale of two brothers on a long walk for a very good cause. she any other way.ave ites. but your erectile dysfunction - it could be a question of blood flow. cialis tadalafil for daily use helps you be ready anytime the moment's right. you can be more confident in your ability to be ready. and the same cialis is the only daily ed tablet approved to treat ed and symptoms of bph, like needing to go frequently or urgently. tell your doctor about all your medical conditions and medicines,

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>> axelrod: there's a couple of brothers we want to tell you about tonight. they're from michigan, 14 and seven years old, and they're in the middle of reminding us all about the power of sharing a load. at the age of 14, hunter gandee has been giving his younger brother, braden, a lift for years. >> i was six, so i was old enough when he was born to know about cerebral palsy. i knew that he would have difficulty walking, and may never be able to do it on his own. >> axelrod: a lift is one thing, but what hunter is doing for braden this weekend is so much more than that. c.p. a disorder resulting from brain damage that affects roughly three-quarters of a million americans. hunter wants to raise awareness about c.p., and is in the middle of carrying braden 40 miles on his back from their hometown of temperance, michigan, to the university of michigan in ann arbor. >> i think it will be great.

it's going to be hard for me and hunter, but i think we can do it. >> reporter: hunter hopes to encourage new ideas to help people with c.p., in particular, a way to make it easier for people like braden to get around. >> he has trouble just going through grass, gravel, mulch, snow, sand-- i mean, we're hoping to get something more all-terrain. >> axelrod: they got a rousing send-off at the start this morning, joined by about 50 friends and relatives for the first part of their walk. hunter and braden made it three miles before making their first rest stop. >> feel pretty good. >> reporter: at mile six, they paused to stretch. hunter may be carrying braden, but braden is lifting hunter as well in his own way. >> whenever i'm going through something that's difficult and doing something that's hard, i see him and how he worked through it. and just kind of pushes me through. >> axelrod: hunter and braid ren set to arrive at the university of michigan tomorrow

afternoon. since polar bears don't like human company, studying them in the wild can be a bit of a challenge. unless, of course, you've put them in charge. these are the first pictures ever taken from a camera attached to a polar bear. the female had been caught and released back into the wild. scientists at the u.s. geological survey hope the footage will help them understand how climate change is affecting the bears. still ahead... the first to make belmont's call to the post. well, that was close! you ain't lying! let quicken loans help you save your money.

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>> axelrod: in just a minute we'll know whether today's belmont stakes has a historic finish. a woman who has already made racing lif hfs was there for the start. >> reporter: when it comes to horse racing, there's no instrument that trumpets the pageantry of it all quite like the bugle. sam "the bugler" grossman has been sounding the call to post at belmont park for the last 22 years. but it's not only the potential of a triple crown that makes tonight's race special. it's who will be bug ling beside him. >> she's just perfect. she's great with people. she plays the horn great. she looks great, and i have

challenged her to be always fabulous. >> reporter: her name is bethann dixon. not only an accomplished muswrirkz but an accomplished horsewoman, too. >> i'm so comfortable in brichs and a riding jacket because of fox hunting. it feels like it was destined. >> reporter: she grew up playing the trombone, sort of the bugle's cousin a few times removed. >> it was a loud instrument. i was a pretty quiet kid and it allowed me to have a louder voice. >> reporter: but as much as she loved horses and horse raig, she never put her lips to a bugle until last year. >> on paper it doesn't look complex. playing it and tonguing the note and making it come out exactly spot-on, that takes a technique and a skill. and i'm honing that skill. >> reporter: bethann became the first woman bugler to blast the call to post at the preakness a few weeks back, and tonight, she'll do it again. with a triple crowp at stake, california chrome isn't the only one feeling the pressure. >> i'm just going to breathe and

not choke. really focus and think on i don't want to blow that note wrong. this is too important. it's heavy. it's a bit heavy. >> reporter: while fans held their breath, bethann blasted hers. her twin passion of horses and music neck and neck. lee cowan, cbs news, new york. >> axelrod: and this update. california chrome faded in the stretch and did not win the triple crown. and that is the cbs evening news for tonight. later on cbs "48 hours." for everyone here at cbs news, i'm jim axelrod in new york. thanks for joining us and good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org

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