learn the signs at autismspeaks.org. another important story that we're watching tonight is the deteriorating situation in afghanistan. 9,000 u.s. troops are on the ground, trying to help the afghan army hold back a resurgent taliban, but the job is getting tougher by the day, thanks in part to moscow. charlie d'agata has this. >> reporter: u.s. defense secretary jim mattis arrived as the the country crumbled deeper into chaos. the russians are supplying the taliban with weapons. his top general john nicholson made it more clear. >> oh, no, i'm not refuting that. >> reporter: the visit comes

after a sneak attack by the taliban on an afghan military base that killed at least 140 afghan soldiers. military vehicles drove taliban fighters dressed in afghan army uniforms past checkpoints. survivors said the militants then opened fire on unarmed afghan soldiers returning from a mosque. mattis called the attack barbaric. the taliban also claimed responsibility for another attack at camp chapman that houses cia and special operations forces. in 2009, seven cia officers were killed in a suicide bomb attack. there were to american casualties this time. the taliban now control about 40% of the country. the u.s. sent 300 marines to hellman province this month. general nicholson said he may need a few more,000 troops.

despite a resurgent taliban, the u.s. military targeted isis militants two weeks ago, driving a 22,000-pound bomb on a series of tunnels. there's been no confirmation of isis deaths. defense sent msecretary mattis said 2017 is going to be another tough year for afghan security forces and there's no word if general nicholson's request for more u.s. troops will be granted. >> charlie, thanks. today in france, nearly all the mainstream political parties united against the far-right candidate in the presidential election. yesterday's vote narrowed the field from 11 candidates to two. marine le pen who wants to withdraw from the european union finished second to emmanuel macron. the two will meet in a runoff may 7th. today a man who never lost a

presidential election made his first appearance since leaving office. dean reynolds is in chicago with the reemergence of barack obama. >> reporter: mr. obama appeared cool and at ease, to a degree only a former president can enjoy. the 44th president chartered a post-presidential future. >> the single most important thing i can do is to help in any way i can prepare the next generation of leadership to take up the baton and to take their own crack at changing the world. >> reporter: there was no mention of donald trump, no response to the frantic attempts to erase the obama legacy or the evidence-free charges that he tapped mr. trump's phones. instead, after several months vacationing and decompressing

with friends, he hosted a forum with budding political activists to recall his days here as a community organizer. >> there's a reason why i'm always optimistic even when things look like they're sometimes not going the way i want, and that is because of young people like this. >> reporter: mr. obama did criticize generally, what he sees as a broken system in washington. >> special interests dominate the debates in washington in ways that don't match up with what the broad majority of americans feel. >> reporter: and he had some advice for those seeking to follow his path into politics. >> worry less about what you want to be and worry more about what you want to do. >> reporter: mr. obama's next public appearance, scott, will be may 7 in boston, where he will accept the kennedy library's profiles in courage award. >> dean reynolds in chicago. correspondent david martin has been keeping up with a wounded vet who has spent years

battling to get proper care from the veteran's administration in his home state of north carolina. he finally got so fed up last week that he packed up and drove north. that's where david martin picks up the story. >> reporter: retired marine sergeant major mackie is walking again. it may not look like much to you, but it beats being stuck in a wheelchair. >> the first time in probably over a year that i was able to stand for any given amount of time. >> reporter: this is exactly what he was doing the first time we met him seven years ago, learning to walk after losing both legs to a land mine in afghanistan. then, as now, he was being fitted for prosthetics at the walter reed national military medical center. >> an important part of the whole system is the fit between this and my leg. >> reporter: it's that socket which brought mackie back after the v.a. in his home state kept him waiting. how many times?

did you get a socket that because of delays didn't fit? >> six or seven times. >> reporter: confined to a wheelchair he gave up on the v.a. at walter reed, he got new sockets in less than a week. >> this is the most work i've done on my legs in a while. >> reporter: he's gained a lot of weight and his hips have lost their flexibility. walking will always be a chore, but it was the inability of the v.a. to keep him in properly-fitting prosthetics that was keeping a good man down. >> they don't know who they're dealing with. i'm just another number that got pulled out of the number machine. >> reporter: ray mackie is back up and back home in north carolina and he's got and call from his local v.a., saying they want to come up with a plan for making the system better. david martin, cbs news, walter reed. coming up next, is there something in the air? passengers squaring off against the crew.

and later, a little girl survives a fall from a moving bus. nth, rid-x helps break down waste. avoid a septic disaster with rid-x. it's your glass of willpower that helps keep cravings... ...far, far away. feel less hungry with the natural fiber in clinically... ...proven meta appetite control. from metamucil. it says you apply the blue one ok, letto me. this. here? no. have a little fun together, or a lot. k-y yours and mine. two sensations that work together, so you can play together.

no matter who was in there last. protection. new lysol power & fresh 6 goes to work flush after flush for a just-cleaned feeling that lasts up to 4 weeks. lysol. what it takes to protect.

because your carpet there's resolve carpet care. it lifts more dirt and pet hair versus vacuuming alone. resolve carpet care with five times benefits a woman seen crying after an altercation with a flight attendant over a stroller she was trying to bring on board got herself a lawyer today. conflicts like that are rare. more than 2 million people fly in the u.s. every day without trouble.

but the skies do seem less friendly. here's transportation correspondent kris van cleave. >> reporter: the latest viral video is another black eye for the airline industry. already under the microscope over how it treats customers after the removal of a passenger earlier this month. >> it's making our job harder, potentially pitting passengers against crew members before they get the plane together. >> reporter: sarah nelson is president of a union that represents airlines. she spoke to us via skype from norway. >> flight attendants are trained to de-escalate conflict every day. that has become a big part of our job now that planes are packed fuller than ever. >> reporter: airline analysts say many passengers feel they leave their humanity behind when they get on planes with smaller seats.

>> at the same time, airlines are staffing their planes with the minimum number of required flight attendants. that's not right for the passenger or the employee either. >> reporter: the faa says there are nearly 24,000 commercial flights a day. the number of unruly passengers hit an all-time low last year. passengers denied boarding was down. while all-time performance went up. but in the age of a smartphone, a mistake or bad day can be seen around the world in minutes. >> when i saw that video, i was very concerned. because it is not a representation of the way flight attendants would respond. >> reporter: american airlines is getting praise for its swift response, apologizing, grounding that flight attendant and launching an investigation. the woman in the video is working with the same lawyer representing dr. david dao, the man removed from that united flight. >> kris van cleave. coming up, a little girl's tumble into traffic.

it was so gross. lysol disinfectant spray kills 99.9% of bacteria, even those that cause stomach bugs. one more way you've got what it takes to protect. arbreak through your allergies. try new flonase sensimist instead of allergy pills. it's more complete allergy relief in a gentle mist you may not even notice. using unique mistpro technology, new flonase sensimist delivers a gentle mist to help block six key inflammatory substances that cause your symptoms. most allergy pills only block one. and six is greater than one. break through your allergies. new flonase sensimist new degree ultraclearnt saving black + white.othes. no yellow stains on white clothes. no white marks on black clothes. new degree ultraclear black + white. it won't let you down. ♪

you don't even want to know protection detergent alone doesn't kill bacteria but adding new lysol laundry sanitizer kills 99.9% of bacteria with 0% bleach. lysol. what it takes to protect. dashboard video captured a horrifying accident in harrison, arkansas, have a look at the white church bus there at the center. the door suddenly swings open, right there, and a 4-year-old girl flies onto the highway. the video of the incident last week came from ryan champoli, a volunteer firefighter and emt. he leapt out to help. the little girl broke her jaw but is expected to make a full recovery.

we got an update on former president george h.w. bush, mr. bush will stay a few more days in the hospital as he recovers from pneumonia. the hope is that he'll be home by the end of the week. and today astronaut peggy whitson broke the record for the most time in space spent by an american, 534 days. president trump and daughter ivanka congratulated her during a video chat. whitson is due home in september, and by then, she will have flown for 666 days. we'll be right back.

mark phillips returns from his latest assignment in good spirits. here's mark's tales from the crypt. >> reporter: you never know what you'll find, digging around an old house. not the old houses of parliament but across the river in 1,000-year old house of worship where important people used to pray. what workers found here lately changed their lives. >> i suddenly thought, i hit the

jackpot. >> reporter: different hat. >> yes. >> reporter: craig dickens found what centuries of archeological study had missed. what was st. mary's church was saved from demolition by being turned into a horticultural museum now under renovation. and when workers lifted a loose slab on the floor, they expected to find nothing. >> there we go. >> reporter: a modern manhole cover now protects what greg found. a hole in the floor, which led to a crypt full of coffins that nobody knew was there. >> your heart stops. you see it, in a sense, panic, you wonder what it is, who it is. >> reporter: there was a hint who it is. a golden crown, an archbishop's miter. a sign that a former head of the church of england was buried here. at least two were.

and one, richard bancroft, archbishop from 1604-1610 was among the most influential. >> he played a crucial role in the church of england. >> reporter: elinor greer is with the gardening museum. >> he was chosen by king james i to oversee the production of the king james bible. >> reporter: perhaps the most widely-printed book in history. it's not going to hurt your appeal. >> no, and it's timed to reopen next month. >> reporter: timing even in 1,000 years of history is everything. mark phillips, cbs new, london. that's overnight news for this tuesday. for some of you, the news continues. for others, check back a little later for the morning news and cbs this morning. from the broadcast center in new york city, i'm scott pelley.

this is the "cbs overnight news." welcome to the overnight news. i'm jericka duncan. president trump is calling on the united nations to do more to stop a nuclear threat from north korea. the president's remarks come amid increasing tension over the possibility of war as american warships sail closer to the korean peninsula. yesterday mr. trump held a meeting at the white house with ambassadors from the u.n. security council. he urged them to be ready to impose stronger sanctions against the north korean regime. >> the status quo in north korea is also unacceptable. and the council must be pepared to impose additional and stronger sanctions on north korean nuclear and ballistic missile programs. this is a real threat to the world.

whether we want to talk about it or not. north korea is a big world problem. and it's a problem we have to finally solve. people have put blindfolds on for decades. and now it's time to solve the problem. >> the white house says the entire senate will be briefed on the north korean threat tomorrow. on monday, the trump administration said the president discussed the quote, urgent security challenge with german chancellor angela merkel. on sunday night, mr. trump also spoke with japanese prime minister shinzo abe and chinese president xi jinping. chinese media say xi told president trump he hoped all parties would exercise restraint. now north korea's detention of another american citizen is adding a new point of friction between the u.s. and north korea. adrianna diaz has the latest from beijing. >> reporter: tony kim's detention was confirmed by the university where he taught. while the circumstances around his detention are unclear, it

complicated an increasingly tense relationship between the u.s. and north korea at a time when both sides are open to military action. with the uss carl vinson heading to the korean peninsula, north korea continues the show of defiance. a statement from the pyongyang university of science and technology confirmed that tony kim had been detained as he was about to leave the country, after spending several weeks teaching at the school. kim is the third american currently being held in north korea. in 2016 otto warmbier was sentenced to 15 years of hard labor after he allegedly stole a banner from a hotel. then a naturalized citizen was sentenced to ten years for espionage. >> this is typical north korea when there's so much tension.

>> reporter: bill richardson has negotiated prisoner releases from north korea. >> they use these detainees from the united states as bargaining chips. they always want something in return. >> reporter: since the arrest, the regime has continued its war of words, threatening australia with a nuclear attack for its alliance with the united states. and on sunday, north korean state media took aim at the u.s., writing, our revolutionary forces are combat ready to sink a u.s. nuclear powered aircraft carrier with a single strike. >> this may be a path forward. some of these prisoner releases have led to at least a dialog with north korea. and that's a step forward. >> reporter: with no direct diplomatic ties, the u.s. is working with the swedish embassy in north korea on kim's case. he was with his wife when he was detained. she wasn't and is believed to still be in north korea. the u.s. ambassador, nikki

haley, issued a stern warning. she said the u.s. is not trying to pick a fight with north korea but warned the regime not to give us a reason to do something. before meeting with president trump at the white house yesterday, ambassador haley appeared on "cbs this morning." she discussed the north korean standoff and efforts to free the american citizens being held in pyongyang. >> can you tell us more? everything we know about the arrest and detention of a u.s. citizen and what we can do about it. >> well, i think right no we're trying to gather information, and of course this is something we never want to see happen, but i do think that it's north korea just trying to show their strength again, and what we're going to say is it's not going to work. and these are challenging times, but it's not one where we're afraid to make a decision, and i think we're going to handle it properly and i think we'll have to use china to do that. >> what considerations are there about options? >> well, we have to discuss that. and i think that's all part of the discussions that will have

to take place. we always want to get every citizen out alive and healthy and make sure that they're being treated properly. so those are the things we'll start to work on. >> the former new mexico governor said these are used as a bargaining chip. do you agree with that? and do you think negotiations are possible at this point? >> i think it's absolutely a bargaining chip. that's what their intentions are. whether that's the case or not is something entirely different. what we're dealing with is a leader who is flailing right now. what he's trying to do is show his citizens that he has muscle, whether it's through his rhetoric or actions, that's what he's trying to do. what we have done is partner with china and the rest of the international community to put pressure on him. you saw the security council last week condemn north korea for their testing. i think you're going to continue to see pressure on north korea. we have said for quite a while now that the united states is not looking for a fight. north korea doesn't need to give us a reason to have one. and i think they're panicking right now. >> i know that president trump

spoke with the chinese president xi last night. what more does china need to do? >> well, i think china is really in good faith doing quite a bit. they are trying to put pressure on north korea, what we have said is we want you to put more pressure on north korea, whether that's with coal, whether it's with oil or other sanctions. they are also talking with the leaders of north korea and telling them they don't need to do anything. so i think china's been a really great friend of ours. the way they came together with us to do the statement last week showed we are united about wanting north korea to stay away from nuclear threats. >> rex tillerson said last week that the u.s. is looking to pressure north korea to reengage with us on a different footing. what does that mean? >> they need to stop misbehaving. that means they need to not use force to reengage. we don't want to see a nuclear north korea. what we've said is they need to

not test anymore. they don't need to challenge us with missiles and talk about how far they can go and challenge our military bases in the area. right now we not going to talk with north korea until we start seeing good actions come from them. we've made it very clear. >> that's exactly what they want, bilateral communication. >> we're not going to do it. until they show us they are in good faith not going to test missiles, we will not talk with them. what we will do is continue to work with china to get that mess toonl them. the "cbs overnight news" will be right back.

because your carpet there's resolve carpet care. with five times more benefits than vacuuming alone... it lifts more dirt, pet hair and removes odours. while softening every fibre because your carpet never stops working, resolve carpet care with five times benefits

nobody does underwater stunts, sylvia. except me, of course. this is my stop. adios! ♪ if you're a stuntman, you cheat death. it's what you do. if you want to save fifteen percent or more on car insurance, you switch to geico. it's what you do. número uno!

as president trump nears his 100th day in office, former president obama held his first public event since leaving the white house. mr. obama addressed the crowd of mostly college students yesterday at the university of chicago. it was a return to the foundation of his political career. mr. obama taught law at the university before being elected to the senate in 2004. his presidential library will be built next to the campus. the former president did not talk about his successor or delve into partisanship. instead, he focussed on young americans and what he says is the most important thing he can do in his next job. >> so, what's been going on while i've been gone? [ laughter ] on the back end, now, of my

presidency, now that it's completed, i'm spending a lot of time thinking about what is the most important thing i can do for my next job? and what i'm convinced of is that although there are all kinds of issues that i care about and all kinds of issues that i intend to work on, the single most important thing i can do is to help in any way i can prepare the next generation of leadership to take up the baton and to take their own crack at changing the world. because the one thing that i'm absolutely convinced of is that

yes, we confront a whole range of challenges from economic inequality and lack of opportunity to a criminal justice system that too often is skewed in ways that are unproductive, to climate change, to issues related to violence. all those problems are serious. they're daunting. but they're not unsolvable. what is preventing us from tackling them and making more progress, really has to do with our politics and our civic life. it has to do with the fact that because of things like political gerrymandering our parties have moved further and further apart, and it's harder and harder to find common ground, because of money in politics.

special interests dominate the debates in washington, in ways that don't match up with what the broad majority of americans feel. because of changes in the media we now have a situation in which everybody's listening to people who already agree with them. and are further and further reinforcing their own realities. to the neglect of a common reality that allows us to have a healthy debate and then try to find common ground and actually move solutions forward. and so, you know, when i said in 2004 that there were no red states or blue states, they're united states of america.

that was aspirational comment, but i think it's, and it's one, by the way, that i still believe in the sense that when you talk to individuals one on one people, there's a lot more that people have in common than divides them. but obviously, it's not true when it comes to our politics and civic life. and maybe more pernicious is that people are just not involved. they get cynical. and give up. and, as a consequence, and we have low participation rates that translate into a further gap between who's governing us and what we believe. the only folks who are going to be able to solve that problem are going to be young people, the next generation. and i have been encouraged

everywhere i go in the united states, but also everywhere around the world to see how sharp and astute and tolerant and thoughtful and entrepreneurial our young people are. a lot more sophisticated than i was at their age. and so the question then becomes, what are the ways in which we can create pathways for them to take leadership, for them to get involved? are there ways in which we can knock down some of the barriers that are discouraging young people about a life of service? and if there are, i want to, i want to work with them to knock down those barriers and to get this next generation to accelerate their move towards

leadership, because if that happens, i think we're going to be just fine. and i end up being incredibly optimistic. there are a lot of different ways to engage, i think is important. because sometimes people think you're not running for office, or it's not election day. thinkers who would argue that one of the problems we have with our politics right now is that the mediating institutions, the unions, the churches, the pta groups, the rotary club, a lot of the voluntary organizations that used to exist like

sororities and fraternities used to bring people in together to work on issues, that those have declined. and the statistics show that people are less likely to be involved with various organizations in their community than they used to be. and what that means is then people don't have some of the same habits of being together on a common project. that they used to. we've become a more individualistic society. and that, i think, has some spillover effects when it comes to both political participation, but also in terms of empathy, because you're interacting with fewer people on a regular basis. the second thing, though, has to do with how we get information. so i want to throw this out and see what people think.

i think a lot of us who have been in politics for a while do certainly 30 years ago, where it used to be everybody kind of had the same information. and we had different opinions about it, but we had the same base of facts. and the internet has accelerated this sense of people having entirely separate conversations, and if this generation is getting all of its information through its phones, that you really don't have to confront people who have different opinions. or have a different experience. or a different outlook. if you're liberal, then you're on msnbc and conservative, you're on fox news. if you're reading "wall street journal" or the "new york

times," or, you know, whatever your choices are. maybe you're just looking at cat videos, which is fine. >> the "cbs overnight news" will be right back. good morning! um, i got something on this, but i'm not quite sure what it is. it's jelly. definitely jelly. it's already coming out. does tuesday work? treat your clothes better with new tide pods plus downy. cleans and conditions in one step. it's got to be tide it says you to me.the blue one here? no. have a little fun together, or a lot. k-y yours and mine.

two sensations that work together, so you can play together.

because your carpet there's resolve carpet care. it lifts more dirt and pet hair versus vacuuming alone. resolve carpet care with five times benefits bite into magnum double cookies and cream... and unleash your wild side. made with cookies & cream ice cream and rich belgian chocolate. discover magnum. a priceless piece of american history from the

founding of the country has been discovered in england. it's a second hand-written copy of the declaration of independence. nobody even knew it existed. the only one like it is the original at the national archives in washington. charlie d'agata has more. >> reporter: up from the archives and now here just for us, the declaration of independence, in great condition, considering its age and despite what we're told is a mouse having taken a nibble out of it at some point. if this is what it is, it is a major find in an unlikely place. one historian called it the discovery of a lifetime. a priceless, hand-written parchment of the declaration of independence. beyond rare. the only one like it is the 1776 copy kept under the glass at the national archives in washington. >> we certainly weren't looking for a copy of the declaration like this.

>> reporter: harvard researchers emily snap and danielle allen came upon it while searching the globe for every known copy of the declaration. >> nobody had an inkling that a second one may exist, so therefore there was no reason to look for such a thing. >> reporter: they believe it was penned in america in the 1780s, probably commissioned by james wilson. >> i'll be the man who prevented american independence. >> reporter: portrayed as a flip-flopper in the movie "1776", but a fervent nationalist. and there is a difference in this copy that drills down to the very foundation of the nation. the signatures are in no particular order rather than listed by state as the 1776 copy. >> it goes to the heart of the american political order. does the american political order rest on a single national people or on treaties hoamong

several states. >> reporter: the researchers believe the document originally belonged to the duke of richmond, known as the radical duke for the support he gave to american revolutionaries. it was handed down over generations of dukes until a local man handed it into the records office in the 1950s. is this going to stay here? >> yes. >> reporter: you're not going to give it up. she makes no excuse for sitting on it for 60 years. >> we knew we had it, but it didn't have the academic interest and research done on it to bring out any of the details. >> reporter: considering its historical magnitude, it hadn't been treated well. it had even been folded into a small square. but for emily snap, it was a thing of beauty. >> being able to go and hold it in our hands, to look at it closely was just extraordinary. >> reporter: we're told the british library will be conducting a series of tests over the summer to determine its authenticity. while people are invited to have come a look if they want, there are no intentions of putting this declaration of independence

on display.

the mother involved in a heated altercation over a baby stroller with an american airlines flight attendant has hired a lawyer, and it's the same attorney representing a man dragged off a united airline flight earlier this month. part of the scuffle over the baby stroller was caught on video. a passenger who witnessed what happened is telling cbs news what she saw. kris van cleave has the latest. >> reporter: it appears according to american airlines that this all started as a passenger was boarding a flight from san francisco to dallas and was trying to carry a stroller onto the airplane that was too big to go into the cabin. the airline is getting high marks in how it responded, but it comes at a time when the industry is under a microscope for how it treats customers.

the video does not show the mother being hit bit stroller or what led up to the incident. as the camera rolled, she is crying and distraught. passenger olivia morgan says she saw the male flight attendant wrestling the stroller away from the woman. >> it almost hit her little baby's head. i said to him, like what are you doing. >> you almost hit that baby in the head. and then he was yelling at me to stay out of it. >> reporter: the passenger in the first class cabin then confronted the crew member. >> hey, bud, you do that to me, and i'll knock you flat. >> you stay out of this. >> reporter: with the captain holding him back, the unnamed flight attendant dares the passenger to throw a punch. american airlines opened an investigation, saying the actions of our team member captured here do not appear to reflect patience or empathy. we are disappointed by these actions.

the flight attendant's union said neither the company nor the public should rush to judgment. >> he snapped when he shouldn't have. >> reporter: an airline industry analyst says flight crews work under enormous pressure. >> airlines are staffing their planes with the minimum number of required flight attendants. that's not right for the passenger or the employee either. >> reporter: the mother was later placed on a different flight and given $1,000 flight voucher. earlier this month, a united airlines passenger was dragged off a plane in chicago. >> oh, my god! >> reporter: united was criticized for its response, initially blaming the passenger for refusing to give up his seat and waiting days to apologize. that's the overnight news for this tuesday. for some of you, the news continues. for others, check back with us a little later for the morning news and cbs this morning. from the broadcast center in new york city, i'm jericka duncan.

captioning funded by cbs it's tuesday, april 25th, 2017. this is the "cbs morning news." breaking overnight. north korea flexes its military muscle once again, this time a massive artillery firing marked the army's anniversary. the next move for the united states and its asian allies. staring down a government shutdown as his 100th day in office approaches. one of the president's biggest campaign promises hits a wall. and for the first time in 16 years, a double execution in the u.s. overnight, arkansas carried out the killing of two inmates as the state rac