mama tonight, a special edition of "world news tonight." pope francis in america. and the breaking news, a final mass in philadelphia for hundreds of thousands that gathered. victims of sex abuse, and prisoners, and the moment he stopped and got out. leaving a family in tears. tonight, the new poll. donald trump losing ground. suddenly tied with him. others gaining momentum. the concert chaos. a stampede, fans carried away on stretchers. the high school heartbreak. the quarterback taking a hit, walking away, but later collapsing. loses his life. the invisible dangers for so many young players. and the miracle baby.

a mother and father out at sea, then the baby coming several months early. weighing a pound. the family, right here tonight. good evening. tonight, from philadelphia, we begin with pope francis' final night in america. if you look over my shoulder, you can see the extraordinary crowd that gathered. the open-air mass nearing an end, hundreds of thousands on hand. for the pope's message to families everywhere. coming after an emotional weekend in philadelphia. a short time after he touched down, he stopped his driver to bless a disabled boy. the mother in tears. and meeting privately with victims of sexual abuse, vowing to hold those responsible accountable.

saying that god weeps. we have coverage beginning with terry moran. traveling request with the pope. >> reporter: he made his way through the streets of philadelphia. the crowds thrilled but smaller than expected. smothering security shut this city down. but this was the main event for francis. the families so close to his heart. [ speaking foreign language ] >> reporter: "love is shown by little things, like a hug or a warm supper." before the mass, he met privately with sex abuse victims. saying he was overwhelmed by shame, and promising justice. >> he's holding everyone accountable. and saying in no uncertain do. helicoptered just ten miles north, but into another world. inside philadelphia's prison, francis spoke to about 100

they listened, some casually, some intently. "this time in your life can only have one purpose, to give you a hand," he said. "all of us are part of that effort." he shook hands with everyone, and received a bear hug from since the moment francis landed, the band playing the theme song from "rocky." extraordinary scenes at the airport. he stops the car, walking over to 10-year-old michael keating. a boy living with disabilities. his mother overcome. at independence hall, he declared his solidarity with them all. and then a prayer vigil last night, where aretha franklin sang, and he offered advice on family life. [ speaking foreign language ] >> sometimes plates can fly.

[ speaking foreign language ] >> and children bring headaches. [ speaking foreign language ] >> reporter: classic pope francis. a pope full of surprises, and who clearly wants to shake things up in his church, in the united states, and around the world. david? >> terry, thank you for your incredible reporting all week long. the city of brotherly love, but as terry reported, much of the city on lockdown. unprecedented security. we took note of the many nuns metal detectors. but once inside, a massive crowd that saw the pope right past them, so many could almost reach out and touch him. that's where we find cecelia night. >> reporter: good evening to you. this crowd may not have been

being here was enough. the city of brotherly love is in love with pope francis. thousands upon thousands of pilgrims packing the city center to bid him farewell. so many, they couldn't all make it in. this is what philadelphia woke up to today. fences around the center of the city. this is how you keep 1 million people and one pope safe. security so intense, it took hours to pass through. the line stretching as far as the eye could see. inside, the wait just to catch a glimpse, even longer. shh! but it was all worth it. >> we slept next to the >> reporter: pope francis gaving

kisses. got a holy chuckle out of this infant. this 4 month old delivered straight to the pope. even just a brief sight of him, enough to bring some to tears. >> he's everybody's pope. >> reporter: others, even luckier. this family, traveling 13,000 miles in a van through 13 countries, all the way from buenos aires. >> he's a very loving person. >> i really understand him. >> reporter: and it paid off. this morning, they got a surprise phone call, an invitation to meet pope francis in person. they are definitely the lucky ones. now, the early crowd count for this one, 860,000 people. fewer than the million predicted. the tight security probably had a lot to do with that. pope francis, now on his way home. these people now feeling a little closer to the people's

pope. david? >> his 4,000-mile trip home now. cecilia, thanks. in the meantime, we move on to the other major headlines tonight. a reality check for donald trump, now sharing the top spot tonight. new numbers showing his big lead gone, now in dead heat with dr. ben carson. and a reality check for hillary clinton now. the democratic side tightening trail. >> reporter: i'm leading every poll nationwide. right. >> reporter: for months, that but tonight, the new poll billionaire neck and neck with the low-key former surgeon. >> i think it says a lot for the it means that they're not pundits but thinking for

>> reporter: battling it out for third place, marco rubio and fiorina facing new scrutiny over her ceo job at hewlett packard. >> i was recruited to save the company, and we did that. >> reporter: today, trump is not the only front-runner slipping. hillary clinton leading bernie sanders by just seven points. a huge drop from july. now, clinton acknowledging the controversy over her e-mails has taken a toll. >> it's a drip, drip, drip. and as i said, there's only so much i can control. but what i've tried to do is provide more transparency and more information than anybody that i'm aware of that's ever served in the government. >> reporter: tomorrow, donald trump will introduce his tax plan, saying it will benefit the middle class and also the

corporations that keep jobs in america. >> tom, thank you. and after his bombshell announcement that he's leaving congress, john boehner back in the news because of what he's now saying. just days after his surprise announcement, he's now declaring there will be no government shutdown over defunding planned parenthood. passing a short-term funding bill with the help of democrats. and something else he's said getting a lot of attention. aimed at the majority he tried to lead. >> the bible says beware of false prophets. we have groups here in town, members of the house and senate in town, whipping people into a frenzy believing they will accomplish they know will never happen. >> saying they're unrealistic about how much a republican in the white house.

freddie gray. dying in a police van last april, his spine nearly severed. now charged in connection with now, the baltimore sun reporting, gray asked for some of the officers reportedly suspected he was faking his injuries to avoid going to jail. and in arizona, a sudden crush of fans. ambulances and at least nine injured. clayton sandell now. >> reporter: for some of the summer ends music fest in tempe, arizona, a wild night ended very badly. >> move up. >> reporter: shortly after rebelution took stage. and the crowd began surging

causing a stampede. >> reporter: the show temporarily came to a halt to rescue foon fans from the crush. >> one of the paramedics pulled me out, so i couldn't get out. people started to lift me out trying to get me out. and i did, thankfully. >> reporter: the fire department says that many of the concert goers were drunk and dehydrated. but tonight they're hoping cooler heads allow the show to go on tonight. denver. and now to the friday night lights tragedy at a high school in new jersey. after a hard hit, able to walk off the field, even flashing a hours later, dying at the hospital. ron claiborne on the hidden dangers the young players face.

school football fatality. 17-year-old evan murray, star quarterback for warren hills high school in new jersey. murray, number 18. took a hard hit during a game friday night. then collapsed on the sidelines. he died later at a local hospital. >> everyone cheers for him at games. he's just a really good kid. >> reporter: so far, he's the third high school player to die after on onfield football injury. fatalities at all levels are rare, but high schoolers suffer catastrophic brain injuries at a rate 40% higher than college players. >> there may be some anatomic factors. where the younger brain is more susceptible to bleed. >> reporter: it isn't known what killed evan murray. his teammates left grieving. an impromptu memorial inside the stadium where he played his last game. spectators say the hit seemed

especially hard, but we won't know if it was the blow that killed him until an autopsy is david? now to a stunning claim to the scandal involving volkswagen. the largest auto maker in the world, admitting they used special software to cheat on emission tests. now, a report claiming that they were warned at least three years ago. and a new clue, the duck boat that slammed into a charter bus in seattle. four students killed. eyewitnesses said the left tire on the duck boat locked up moments before the crash. tonight, investigators revealing the left front axle was sheared off. occur

still much more ahead on sunday. the miracle at sea. pound. crew made a frantic life-saving and the giant mystery on nasa's big news, a question finally solved. reveal tonight. will perform for the pope in five minutes, by yourself. this is the choir boy who jumped in, and what the pope did right afterward. talk to your doctor about viagra. ask your doctor if your heart is healthy enough for sex. do not take viagra if you take nitrates for chest pain; it may cause an unsafe drop in blood pressure. side effects include upset stomach and abnormal vision. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. stop taking viagra and call your doctor right away if you experience a sudden decrease or loss in vision

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more than three months early, and more than 100 miles out at sea. here's mary bruce. >> reporter: tonight, the tiny baby that beat big odds. hayden morgan, born 14 hours from land. >> i knew this was the true labor pains. i was going to have this baby. >> reporter: two days out on a cruise, emily morgan suddenly goes into labor. weighing 1 1/2 pounds. doctors brace the morgans, telling them their son is unlikely to survive. >> i was basically trying to stay strong, and focus on emily. >> reporter: but emily is determined. her maternal instinct kicks in. she insists on seeing her baby. >> i didn't care if he was alive or dead. >> reporter: she sees his pink skin, hears him breathing and

as the captain races to shore, the morgans and the medical staff race to keep the baby alive. wrapping him in towels and creating a makeshift incubator. they reach land with no time to spare. >> he was a miracle to push through that and he's a fighter. >> reporter: hayden remains hospitalized. but the family hopeful he will be released by late december, his original due date. mary bruce, abc news, washington. >> thank you. when we come back, what is mars? and the driver trapped in a car filling with water. america tonight. something to look for in the sky. the moon getting ready to put on a super show. something we haven't seen in 30 years. it won't happen again until 2033. we'll be right back.have about 450 million fans.

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today, jason is here to volunteer to help those in need. when a twinge of back pain surprises him. morning starts in high spirits but there's a growing pain in his lower back. as lines grow longer, his pain continues to linger. but after a long day of helping others, he gets some helpful advice. just two aleve have the strength to keep back pain away all day. today, jason chose aleve. aleve, all day strong. and try aleve pm, now with an easy open cap. only nexium 24hr gives you nexium level protection for frequent heartburn all day and all night. try nexium 24hr, the #1 prescribed acid-blocking brand, and get all day, all night protection. nexium level protection. to the "index" of other news tonight. starting with the dramatic water rescue. a driver trapped, the car

filling with water. a trooper's body cam capturing the scene. the car plunging into a canal. his legs pinned, but rescued just in the nick of time. now to the super blood moon happening tonight. images coming in from berlin to somerset, england. this has happened only five times since 1900. the next one, not until the year 2033. tweet me your pictures. we hope to get some of them on tomorrow night. and word that nasa is preparing for a big announcement tomorrow. after this tweet, mars mystery solved. speculation at a fever pitch. one saying, this better be al aliens. and another, it's about water. and lots of ideas out there. we'll be on this story come tomorrow. when we come back, the one moment this weekend that left everyone speechless. the pope wasn't the only star in town. and we guarantee, this will make you smile.wn.

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finally tonight from philadelphia, the countless faces we've met on the road this past week, all waiting for the pope. and the boy who gave the pope and this entire city one unexpected gift. after winding his way through philadelphia, pope francis will begin to make his 4,200-mile

trip back to the vatican. we asked him a couple of weeks back, are you ready for your trip to america? and without hesitating, he said yes. and every place we visited, americans were ready for him. the little girl that ran through the barricade not once, but twice. so many who lined the streets, all the way from california. >> i would have gone anywhere to see the pope. >> reporter: and the seminary student moved. by a pope reaching out to the people. >> he's fearless. that can be a scary thing. him. tens of thousands outside central park. even the nypd telling us the crowds were different. is it the pope effect? >> we think so. >> reporter: and the couple flying all the way from hawaii. >> he's such a humble man.

all. after a change of plans, asked asking if he could sing a cappella, something he had never done before. and just five minutes to prepare. just listen. >> reporter: and when he finished, bobby, who wants to be an opera singer one day, walked up to the pope and give him a rock from his choir trip to antarctica. the pope saying, for me? then calls him back, handing him a little red box, a rosary, in return. they shake hands. and then a standing ovation. his voice, just incredible. thanks for watching. for cecilia and tom and the entire weekend team, i'm david muir. i hope to see you right back here tomorrow night from new york. until then, have a good evening. good night. night from new