The distance, just hours away from the fight of her life. And the golden girl, 49, but with the heart of a giant. Simone biles goes all out to solidify her status as the best in the world. But first, the nightline 5. Ext1 italics good evening, thanks for joining us. Its been two months since that horrific massacre at the pulse nightclub, but for those who survived, the heart ache is still fresh. We traveled back to orlando to followup with those loved ones whose lives were forever changed. One grieving mother turned accidental activist. Speaking out for gun control in the midst of this contentious political season. Vowing to turn her tragedy into heres a picture of him at his birthday. He was one of the good ones. You would have loved him. As your neighbor, as your son, as your cousin. You would have loved him. Because he was what we want to be. Reporter for christine line nen, life will never be the same. So this is unfortunately, what youre left with when your your space. Here, inside her living room, shes surrounded by the belongings of the son she lost. I just really shoved everything in wherever i could find a space. I dont want to get rid of his things. Theyre so much a part of him. This is all i have. This is what he loved. Reporter its been two months since that frenzied morning when the world saw this confused and frightened mothers face for the first time. Well, they said theres of dead bodies in the club. Reporter her only son, christopher, and his boyfriend, juan guerrero, gunned down, among the 49 killed at the gay nightclub pulse. I called him last night at 6 00 and i left him with, i love you. The crush of cameras now gone, but the city of orlando, still reeling from the deadliest mass shooting in modern american history. 62 days later, its just as easy rifle in the state of florida. Youre focusing your attention on the high capacity assault rifle. Yes. The type of weapon that was used . Right. No one needs a highpowered weapon. No one. Reporter the gunman managed to wound victims with more than 200 bullets. Christine and so many others, learning the gruesome details of their loved ones murder in autopsy results released just last week. Why is it so important for you to have that information . Well, i need though it haunts me that he was slaughtered and his entire torso was tore up with seven to nine bullets. So many shots, so quickly, so easily. And that he legally bought that high powered weapon just one week before the shooting. Reporter one last victim still clings to life in the hospital all these days later. But the damage left behind, not just physical. The emotional scars are fueling control. But despite a passionate Senate Filibuster and that dramatic sitin on the house floor led by congressman joe lewis, every single piece of legislation has since failed. We dont know who is going to be the next mass shooter. All we can do is try to protect ourselves from this type of weapon, so that when they do get their fuse lit, thatbe can overcome them, relatively quickly. Reporter she echoed that sentiment in front of thousands at the Democratic National convention, supported by two of her sons friends. That love always trumps hate. Reporter her home state of florida, now a battleground, in every sense of the word. Shes been campaigning with progun control Senate Hopeful patrick murphy, working to unseat republican marco rubio. We could solve this. Election. For the many survivors of the pulse rampage, the emotional wounds only seem to deepen. Twobyearold tiara parker was shot that night, after what started out as a night out dancing with her cousin and a close friend. I met with her just hours after she was released from the hospital. Can you see the holes . Reporter those are the bullet holes . Yes. Thats unbelievable. Reporter for three hours, the trio was trapped in the nightclub bathroom. Yeah, it went in here and it came out of my back. Reporter and then a chilling moment. Coming face to face with the killer. I guess he must have thought i died with my eyes open. And i just kept staring at him. From then i thought, he was going to shoot me in my face. But i was just sitting there and i just stared at him. Then after he got up, you just hear him say, oh, yeah. Reporter she and her friend patience carter, managed to cousin, akeira murray, who just graduated high school, died that tragic night. Im pushing through as much as i can. Reporter earlier this week i checked in on her in her hometown of philadelphia . Describe the pain. I feel like my lungs are caving in. Like theres no light anywhere, im just spinning in one circle. Thats how i feel. Reporter but even from the depth the despair shes risen to help with jessica alba as an honoree for the teen choice courage award. Tonight we stand together with these teens, united in our call for peace, and an end to this violence. Reporter but even as shes recognized for her heroism, the unrelenting cycle of gun violence continues. A man was shot three times in north philadelphia. Reporter two weeks ago, another of her beloved cousins murdered. 24yearold Donte Williams i want to go over and say, hey, kuz, and hug him. I dont think anybody understands. They were my close knit. They meant everything to me. I seen donte two days before he was killed. As she was breathing, i try to stay focused. Sleepless nights, recurring nightmares. Tiara experiencing the classic symptoms of stress. She said shes still hoping to find the right treatment. As for christines healing process what i have found that has. The most cathartic, believe it or not, has been being around christophers friends. I loved them all before anyway. I was always stealing his friends on facebook. Hed say, mom, stop stealing my friends. I said, i wont say anything creepy, i promise. Reporter on this night, christines hanging out with friends. Brandon and his boyfriend eric were out with her son and juan that night at pulse, but managed to run out when the shooting began. Youre two months out, what goes tlur your mind . Not that i escaped death, that i was lucky in any way, but that two of my best friends did not escape death. I never want this to happen to anybody else. Reporter which is why brandon and some of christophers other friends created the drew help lgbt youth. Gay people really struggle to survive every day, for someone to come to our home, where we feel safe, where we love each other and protect each other and harm us, if thats not a rallying call, then i dont know what else we need. Reporter turning pain into purpose. When this matures, its going to have a rainbow bark. Reporter planted in memory of her son. Christophers blooming corner, with flowers and rainbows in honor of him. Im not the same. Im not the same. On june 12th , i became a different christine. One thats going to be more powerful in some ways, but so lost and empty in so many ways. Of course our hearts go out to all the families touched by this traged model turned boxer, the brawling brawny beauty about to make her olympic debut. And later, simone biles sticks the landing in rio. Looks right to me. Shouldnt it be clear clearly. It is time to get a great deal and a reward card on this turbocharged jetta. Gotta make room for the 2017 models. It is a clarence event. Why is that so hard for people to understand . It seems clar to me. Dont miss the volkswagen model year end event. Hurry in for a 1,000 volkswagen reward card and 0 apr on a new 2016 jetta. Hey, honey . Yes, de . Youre washing that bakedon alfredo by hand,right . Yes, dear. Dish issues . Cascade platinum. Powers. Through. Your toughest stuckon food. So let your dishwasher be the dishwasher. This turned out great. Cascade. 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And i want to build a career after that. Mikaela mayer reporter i first met her olympic stadium, but in this baseme basement gym in the outskirts of atlanta, where some of the best amateurs in the world facing off at the tournament of champions. A ramp up to the olympics. Red corner, Michaela Mayer reporter michaela spends almost all of her time in the jim, three times a day, six my boxing workouts are literally more mentally draining than they are physically. Reporter now a serious olympic medal contender, michaelas road to rio was an unlikely one, while her teammate clarissa shields started boxing as a kid, and had won gold by 17. When michaela was a teenager, she was fighting, but nowhere near a boxing ring. Why were you kicked out of school . Of my exbest friends. Reporter she said her life was starting to take a dark turn. When i found boxing, i switched gears. It focused me. I topped going out. I stopped partying. I cracked down in school. It seems that being in the ring is not about fighting and taking out anger, its about discipline and technique. Definitely. Theres a bigger goal now. Reporter to fund that goal, michaela has had to use her brn a millions of girls are told theyre pretty. Reporter shes been the face of dr. Pepper. But not many end up becoming a model. Reporter shes even been featured for the muhammad ali collection. Have the prettiest foot work, the prettiest face. Reporter a runtime model, she doesnt mind the bright lights, but she says female fighters shouldnt have to show skin to get paid. How you fight in the ring, pretty face behind their products and its sad but true and thats the harsh realities of the world. Reporter in another harsh reality its the men, mayweather and pacquiao ring a bell . The top ranking female fighters make less than minimum wage. A typical championship fight for a woman professional, shed make about 5,000 still. Championship fight, hes going to make hundreds of thousands, and potentially millions of dollars. Reporter something that these heavy hitters are hoping they can knock out together. I do believe im going to get a chance to headline in vegas. You gotta be, you know, a woman that everybody wants to see fighting. Reporter but this year, they have their sights not set on green, but on gold. Just last month, we caught up springs, where she and the other olympic hopefuls from team usa, were living and training. Youre surrounded by athletes with the same common goal. So really, every direction you turn is an olympic focus. Its almost like youre back in college a little bit. Because its kind of dormstyle living and everybody eats in the same cafeteria, but its fun. Reporter in the leadup to the olympics, the fighters have become a family okay. Put your hand out. How cute is that . Its a sword oh, my gosh, i love it. Isnt that so cute . You better like it. Good job, mikaela, that is cute. Supporting her every step of the way, jenny fierce, her sparring buddy and travel mate for years. Shes one of my best friends. Shes not competing in rio, but and im super happy about that. Caller and of course clarissa shields who is defending her own gold medal. Clarissa is five years younger than me, but shes already an olympic gold medalist. Shes been here, shes done this. So i look at her as inspiration. Shes going to help me mentally when im there, knowing that i have her by my side. You got to shoot that cannon. Double the cannon up, okay . Reporter mixing a little fun wither had fighting, the women even came up with code names for their punches. Thats your jab. Fire the cannon. Walk the plank, youre walking them back towards the rope. Its a lot of work, so we got to find spots to kinda make ourselves laugh and have a good time. Reporter and now, after years of hard work, dedication, and singleminded focus, mikaelas made it to rio and she says shes ready for the biggest fight of her life. To get here. The chances of actually making it were very slim. But to have a dream, you have to believe in yourself. You have to believe youre the best before youre the best. For nightline, im rachel smith in atlanta. Up next, simone biles leaves it all on the mat in the allaround competition. Abc news nightline, brought to you by pfizer. Had a lot of d. I was a smoker. Hands down, it was, after one week of chantix, i knew i could quit. Along with support, Chantix Varenicline is proven to help people quit smoking. Chantix definitely helped reduce my urge to smoke. Some people had changes in behavior, thinking or mood, hostility, agitation, depressed mood and suicidal thoughts or actions while taking or after stopping chantix. Some had seizures while taking chantix. 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Tonight she won the medal just to reporter its official. The worlds greatest gymnast. Simone biles springing into action. And grabbing that coveted title in rio, winning the womens individual allaround gold medal. Standing tall at just 49, the 19yearold, unstoppable, defying gravity, flipping and flying through the air. Landing, a champion. And of course her teammate gabby douglas. A dream come true for the ohio native. I was just a really hyperkid and i was always bouncing off the walls. So gymnastics fit perfectly and i didnt try any other sports. Gymnastics chose me. Ive loved it every since. Her signature flip aptly named the biles. On the second flip she does a half turn and lands forward. I believe its the most difficult routine ever performed in the short of gymnastics. Her teammate aly raisman, impressing with the silver second. Biles relishing the victory with her teammates, leaving rio with that coveted medal and a taste how sweet it is. As always, were online at abc news. Com and our Nightline Facebook page. Goodnight, america. Ca today on the Meredith Vieira show and actor charl sheen is hiv positive. And the latest developments in paris. And a video released threaten a major american city. Talking about the wizz live. And the mystery celebrity get away week. Can a blind folded viewer guess the celebrity guest she is next to. All starts right now on meredith. [applause] . Makes you feel [applause] meredith thank you, everybody, thank you, thank you. Oh, thank you so much. My first guest rose to star playing mercedez on hit show glee. Amber riley will be here. And yesterday we kicked off the