oh and your friends are friends with country starsuying homes this is "nightline." >> tonight, women uniting in a campaign in the fight for abortion rights. ism i was wise enough to know like i'm not ready to be a mom. >>, hoping to sway the highest court in the biggest challenge to reproductive rights in two decades. >> this is what the pro-life movement looks like. >> tonight, line with impassioned supporters on both sides, trying to make the critical difference. plus, "modern winter grew up in the spotlight. >> but that's okay >> now she is opening up about her breast reduction surgery. >> i was in pain. p straight. >> and how life at home was anything but a hollywood fairy tale, and her newfound

>> you're lighter in every way. >> exactly.tronaut scott kelly's return to earth. >> i felt like i had been up there my whole life. >> tonight, how this historic mission in nearly a year in zero gravity may have changed him.y younger and but first, "the nightly news" five. >> only is approved to relieve eyes. six is greater than one. complete allergy relief or incomplete. let your eyes decide. six one changes everything.

for joining us. tonight, high stakes in the biggest abortion case in more than two decades. we're inside the very humanides of the debate. as many look to make the crucial difference in a legal decision that could impact millions of gloria riviera. >> reporter: separated by just a few fee apart. today outside the supreme court, passions inflamed on bothca's most enduring culture war. while ortant abortion case being considered in a generation. >> improve patient safety. that's what these laws have always been about. >> they won't promote women's are going to make abortion less safe.

controversial texas law that clinics as unconstitutional is stephanie toady. it's her first time at the nation's highest court. but with her, some star power support. >> i realize thehave less choice than i did. >> reporter: judging amy and leftovers actress amy and 40 other women lent their name to the cause, saying that having an abortion allowed them to havelives. >> i was 21. it was after my junior year. >> reporter: this week, she opened updeo posted to youtube. >> i feel so blessed that i was in place that i wasn't l"ed shape med and i was supported. if you start delving into your family and friends, you're going to find a woman who's terminated aerefore, it's in everybody's life.

>> reporter: believes restrictions around the country are going too far, she's joinedther celebrities in the draw the line campaign. >> i'm elizabeth banks, and i draw the line for rebecca. >> reporter: encouraging women to share their stories abouton helped them instead of this is not the first campaign of its kind. >> i had an abortion last year. it was an incrediblyence for me because i didn't want to become a mother. >> reporter: last year, amelia decided to share her story on facebook. and giving it a hashtag tmyabortion, and it went viral. >> plenty of people still believe that on some level, if you're a good woman, abortion isd be accompanied by sadness, shame, or regret. but i have a good heart, and having an abortion made me happy in a totally unqualified way. she was not surprised by the outpouring because one in three women in this country have had an abortion by the age of 45,

there were women in and out of my social circle that were just saying, hey, i had an abortion too. >> i think the shout campaign is phenomenal. i love it. >> reporter: they have taken it personally. >> look at you! >> martha plimptone had a positive experience. for me in particular, because i did have two abortions as a young woman, i feel that my ability to access thatcal care made it possible for me to live out my dreams and do what i really wanted to do with my life. >> reporter: among other as law requires that abortion clinics are more like surgical centers, and that doctors have admittingspital within 30 miles. >> you want to be a health care provider, then act like it. that's what we're saying. >> reporter: critics of the law say adhering to the new standards make itbortion providers to remain open. especially in a state the size of texas.

and other states across the region are at risk of losing their constitutional right toe abortion care. >> reporter: millions of women. the ripple effect could be huge. >> absolutely. we have seen copycat laws inn the south. >> reporter: and since the law was enacted, half of the abortion clinics in texas have closed. what kind of are you hearing? >> stories about women having to travel out of state because the waits for an appointment with an abortion provider in texas long. >> reporter: in a new documentary, "trapped," doctors and nurses at whole women's health, one of the texas abortion clinics that's res stories about how they had to turn away women in need. >> there's a two to three-week waiting list for a procedure where time is of i remember getting a call

i tell you what i have in my kitchen cabinet, and you tell me what i can do. on the other side of the issue say that the texas law and others like it are designed to protect women's health. anti-abortion submitting briefs to the court, citing 3,000 women who they say suffered grievous psychological injuries after their abortions. >> a majority of americans, whether they say they are pro-life or pro choice on the issue of abortion, agree that abortion should be safe for women.sten hawkins is presidents for students for life of america and has recruited thousands to the cause. >> today we have come out to show the that this is a pro-life generation. my mission is to abolish abortion. and to make abortion illegal. >> reporter: she thinks the stricture regulations on

nation are just the first step. pro-life generation! >> reporter: we were with the young mother last year at one of the largest ever anti-abortion. this is what the pro-life movement looks like at its strongest in the united states today. we're at the march for life. ands on for miles. >> today i speak to you pregnant with my fourth child. my first daughter.re the pro-life generation! >> reporter: to some, like 16-year-old devin, she's a hero. life? adoption? >> she was born in october of this year. i wanted to have an abortion when i found out i wasy daughter. and i was given the options that i could do abortion and not tell anyone, or i could leave home. for adoption.

ashamed i got pregnant at my ageter: hawkins regularly conducts what she calls sidewalk counselling outside planned parenthood clinics with student from the university of new mexico. >> whenever i sidewalk cancel, the women. >> reporter: but the young women on the other side, women who could be her classst as dedicated. many feel that the greatest danger is to women, forced to turn to illegal, unsafe alternatives if the texas law is upheld. >> since these effect, there's been an increase in attempts at self-induced abortion in texas. because they simply can't make the trip that is now requiredto reach an abortion clinic. >> reporter: but for now, stephanie has done what she can.

the eight remaining justices.n is a human right! >> reporter: but no matter the ruling, we'll likely see this scene play out again and again.ro women, pro-life! >> reporter: this battle isn't ending anytime soon. for "nightline," i'm gloria riviera in washington, d.c. next -- mily" star ariel winter opening up about why she chose to have a breast reduction. and later, astronaut scott kellyscience experiment now comparing him to his own twin brother. there's no such thing as a little flu.ig solution: an antiviral. so when the flu hits,or right away and up the ante with antiviral tamiflu. prescription tamiflu is an antiviral that attacks the flu virus at its sources stop it from spreading in the body. tamiflu is fda approved to treat the flu in people two weeks

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"modern family" star ariel winter grew up in the limelight, facing harsh criticism constantly.peaking candidly about her breast reduction surgery and opening up about childhood. >> i'm not. but that's okay i'm thee. >> reporter: we fell in love with her as alex dunnphy, theld on "modern family." >> ha beating me in words with friends. how is that possible? >> reporter: we watched her grow up on girl to an 18-year-old woman. and just last year, when she was 17 years old, she decided to undergo breast reduction surgery going from a 32f to a why did you decide ultimately to get breast reduction surgery? >> i had wanted to get a breast reduction since i was in excruciating pain, and i couldn't sit up straight.

uncomfortable for me to sleep. it's uncomfortable to sit. uncomfortable to walk. down in dressing rooms because i couldn't find a bathing suit because they had no top that would fit me. i just didn't feel right. and i did it for the best change i ever made in my life. >> what's been the most noticeable change post surgery for you? >> i think maybe my mood. in general.t much happier. and i just feel a lot more secure with myself. >> reporter: you're lighter in every way. >> reporter: you wore's a stunning gown to the sag awards, and you were not afraid to show your scars. >> no, i wasn't. i didn't even notice nk to cover them. i didn't even think twice. it really astoubded me when i was getting comments from people to say put my scars away, they were gross. and i considering they are a part of me. they're not going away. i know so many people that have scars, and there's nothing wrong with rs are cool.

we've got stories from them. >> reporter: although she's young, winter says she's already had a lifetime of challenging you were thrust into the limelight at a very young age. were you prepared for what came with that? >> i don't think anyone's so young and having everybody's eyes out, especially now as i've gone through some of my really -- some really big moments in my life being in front of theas been pretty difficult, because you have everybody's opinions. so i think it was a little shocking for me in the part of that shock was from the public scrutiny. online bullying and body shaming she experienced. >> walking down and having every headline be about my cleavage, and not about my talent and what i was really there for or anything that i wanted to be put out there. and i thought that was really >> reporter: just the fact that we're sitting here discussing your decision, and what went into deciding whether or not toon surgery, i mean, is it crazy to you that

women face each and every day, especially those in front of thenk it's absolutely ridiculous. it really bothers me. but, you know, i can only do my part. >> reporter: she's hoping her experience will help other girls, and wishes for awomen in hollywood are no longer scrutinized for their looks. but despite her success as an actress, she says it's a path she might never have that when i was born, it was kind of already decided what i was expected to be. and so i was kind of pushed into the not to say i don't love it and it's not my passion now. i do love it. >> reporter: her work as an actress started when she was just 4 years old. from ame one after another, guest starring in "crossing jordan." >> she says he didn't love us. >> come on, sweetie.ter: and "criminal minds." >> i want to find my mommy. i like living there.

"e.r." as a girl whose mother needed a heart transplant. and she's been working ever reporter: did you have what most people would say is a stage mom? >> she most definitely was. this is what she wanted me to do. and she pushed very hard for kind of put that in the forefront of her mind instead of what i wanted and what i needed. and that was definitely hard. that was the only issue. >> reporter: winter went through several years of legal battles with her mom over allegations of emotional and physical abuse. in abc news, winter's mother said to further her career, ariel is conjuring up stories, and i deny all of ariel's accusations., the actress became emancipated from her mother. >> it wasn't a supportive, loving home. i had a really tough time. >> reporter: winter is not the only kid star who ema parent. "home alone" actor macaulay culkin did it after a financial

and then there was actress drew barrymore, who emancipated at 14. according to her her and /- her mother haven't had much contact since. do you have a relationship with your mom at this point? >> we haven't spoken it's really hard to have that kind of drama in your life and have an open court case and have everybody look at it. it's hard for abuse victims, but it'sc eye when everybody has an opinion and there is no black and white of the situation. >> reporter: you refer to yourself as an abuse victim. what happened to you? >> well, really hard to talk about. and the reason i haven't talked about it thus far is because it was really painful for me to watch my mom go on newsd go on "dr. phil" and kind of spread things everywhere when it's really just private family business. i feel like for me, ild take the high road and do something that i would have

me. >> reporter: and for now, she's closing that chapternormal 18-year-old things. >> it's always been a dream of mine to go to college. >> reporter: she's applying to colleges with plans to become a social justice lawyer. >> i've had a lotrience that i think has really helped me grow into the person i am today. and i think it's something that shaped what i wanted to be in my future. >> reporter: fore," i'm amy orrback in los angeles, california. scott kelly returns home. could the answer to growing be here, spinning in space? abc news "nightline" brought

finally tonight, astronaut scott kelly is back on earth, proving it may just take ast to find the fountain of youth. here's abc's david wright. >> reporter: 340 days slipped the surly bonds of earth, scott kelly is finally home. overnight, his soyuz capsule in kazakhstan, kelly testing the earth's gravity with a fist pump. >> i felt like i had b life. >> reporter: in an odd way, he has. in one year of zero gravity, he circled the earth more than 500 years of sunrises. you could say that now makes him 15 years older than his identical twin brother,ark kelly. but albert einstein would argue

einstein's twin paradox maintained that a twinugh space on a rocket ship would age more slowly than the twin remaining on earth. another difference, scott is now apparently two inches his spine likely stretched while he was in orbit. nasa will now be studying that, comparing the two. all of which may sound like amovie, and it's tempting to think of scott kelly a bit like another fictional astryou blew it up! >> reporter: a year ago the super tuesday results would have been as unthinkable as -- well, e apes. >> damn you all to hell! >> reporter: in a year, the blink of an eye, the come to pass. >> thank you very much. i appreciate it. >> reporter: how ust must it look to in new york.

it was a french writer andre geed who said, men new oceans unless he has courage to lose sight of the shore. thank to "good morning america" tomorrow morning. and as always, our facebook "nightline" page and abcnews.com.

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