nightly news." reporting tonight, thomas roberts. good evening. tonight new and graphic details about bill cosby's own admission concerning drugs, hush money and sexual assault allegations. in a now fully released deposition from a 2005 sexual assault lawsuit, he admits to dprooming women into sexual situations with promises of fame and career advice. cosby's tactics for his hollywood casting couch are described his own words as quote, playing sex with an alleged victim. cosby has vigorously denied all sexual assault allegations and has never been criminally charged. with more on the story, nbc's gaddy schwartz. >> reporter: in yet another round of explosive revelations, documents obtained by "the new york times" shed more light on cosby's own allegations about how he seduced women. the deposition taken over four days of intense questioning, part of a 2005 lawsuit against cosby filed by a woman who claimed she was drugged and molested by the entertainer. in the transcripts bill cosby defends himself suggesting to a lawyer he was good at reading nonverbal signals on when a woman would consent saying she does not say to me don't ever do that again. she doesn't walk out with an attitude of a huff because i think i'm a pretty decent reader of people and their moegs and these romantic sexual things. cosby denies giving the accuser anything stronger than benadryl to relax before a sexual encounter, but the woman's lawyer said her client thought it was a more powerful drug. an allegation that follows cosby's admission that he obtained seven prescriptions for quaaludes in the 1970s that he intended to use for sex with women. cosby reveals he didn't take them himself but used them the same as a person would, say, to have a drink. transcripts show a lawyer asking, when you got the quaaludes, was it in your mind that you were going to use these for young women that you wanted to have sex with? cosby responds yes. did you ever give any of those young women the quaaludes without their knowledge? cosby's lawyer interrupted do not answer the question. cosby admitting that he once asked a model about her father's death to get close to her. today another alleged cosby accuser barbara bowman reacted to the incriminating details. >> it was a sigh of relief to say, i don't have to defend myself any more and these other women don't have to defend themselves any more. >> reporter: cosby also described the lengths he took to keep his affairs private from his wife camille. request "times" writes cosby once blocking a damaging magazine article and sending a woman money through his agent so mrs. cosby wouldn't find out. nbc news has reached out to his representatives but have not received any comment about the deposition. cosby has not been charged with any crime in connection with these allegations and he's denied past allegations and any wrongdoing. he settled out of court with the accuser in this case. donald trump said today he owes senator john mccain no apologies one day after declaring the vietnam veteran and prisoner of war is quote, not a war hero. the comments drew quick reaction from other republican candidates for president including wisconsin governor scott walker. kelly o'donnell is on the campaign trail in cedar falls, iowa. good evening. >> reporter: good evening, thomas. new tonight, one of the top tier republican candidates governor scott walker, says that it is time for trump to apologize and walker has tried to steer clear of donald trump's message. but walker in an exclusive interview tells me it's time for trump's supporters to also urge him to apologize. >> john mccain picked a fight with me. >> reporter: the donald trump reality. today he claims he said nothing wrong when he slammed john mccain's years as a vietnam prisoner of war. >> he's not a war hero. >> he's a war hero. >> he's a war hero because he was captured. i like people that weren't captured. okay? i hate to tell you. >> do you agree with that? >> he's a war hero because he was captured. >> reporter: but trump doesn't call all the shots. today wisconsin governor scott walker who has avoided tangling over trump, tells nbc news in an exclusive interview, trump must make amends. >> at a minimum he needs to apologize. in terms of the race that's up to the voters. but clearly he needs to apologize and refrain from comments like that. >> reporter: he's refusing to do that. >> i think more people need to push him. and not just candidates or elected officials. i think more people from across america including some of those who may have been up till now supporters of his. >> reporter: trump appears impervious to the heat. today by phone trump was again in the high-speed lane o big talk saying yellous competitors want him to quit. >> of course they'd love to have me do that because i'm leading the pack. i'm certainly not pulling out. i'm leading in many states. >> reporter: at thooes four veterans groups blasted trump calling his attack on mccain an insult and despicable. hillary clinton tried to spread the blame around. >> it's shameful and so is the fact that it took so long for most of his fellow republican candidates to start standing up to him. >> reporter: although trump did back pedal enough to acknowledge mccain's service, republican candidate lindsey graham says voters will handle trump. >> if you show a disrespect for a p.o.w. you're probably not gog get the nomination. >> reporter: and while mccain has not spoken publicly, graham tells me that mccain wants iowa voters to remember their own. buzz day who served alongside mccain, both were in that vietnam prison. thomas? >> kelly o'donnell, thank you. tonight we're learning new details about the life of the gunman who shot and killed five military service members in chattanooga, tennessee. the family of mohammad youssuf abdulazeez says their son suffered from depression but investigators are still searching for a motive. nbc national correspondent miguel almaguer has our report. >> reporter: paula approximatemeyer came to say good-bye bringing her boy an american flag and a baseball mitt. naval petty officer randall smith. >> he died doing what he loved. he would have it no other way. >> reporter: the grief for this mother and so many others is overwhelming. at church services they remember all five of the fallen servicemen. a wounded city turning to their faith and to each other. today there was little mention of the gunman mohammed abdulazeez. before the shooting he sent a friend a text message with a link to an islamic version including this line -- whosoever shows enmity to a friend of mine then i have declared war against him. overnight for the first time the shooter's family released a statement. for many years our son suffered from depression. it grieves us beyond belief to know his pain found its expression in this heinous act of violence. >> reporter: david wyatt wyatt's father tells us his son died a hero. when fire broke out he helped strangers get to safety. >> he loved his family, and served in the marine corps. it was his proudest calling. >> reporter: tonight while a police sergeant is still recovering marine demonty cheely also injured is back at home. the healing process for them and so many others in this community is far from over. >> he's been my hero since the day i gave birth to him. >> reporter: tonight a senior law enforcement official tells nbc news that the gunman spent some time at a shooting range before the bloodshed here. he also says there's no clear indication he was radicalized by any terror group. >> we can see the growing memorial behind you. miguel almaguer in chattanooga, thank you. the family of a woman found dead in a texas jail has ordered an independent autopsy. police say that 28-year-old sandra bland committed suicide in her cell but her family questioned that account. bland was arrested earlier this month after a confrontation during a traffic stop. nbc's charles hadlock has more. >> reporter: today a prayer service, steps from where sandra bland was arrested just over a week ago. her sisters arrived in prairie view texas, seeking answers about her death. bland, who was about to start a new job, was found hanged to death in a texas jail cell. three days after a traffic stop turned into a confrontation. >> you just slammed my head into the ground. >> reporter: bland's family says this bistander video not verified by nbc news shows her arrest though not the moments leading up to it. authorities say bland was argumentative and uncooperative and was charged with assault. the family attorney says he's seen police dash cam video which has not been released to the public and wants to know why bland was even asked to get out of her car. >> he asked her to put out a cigarette. she says why do i have to put out a cigarette when i'm in my own coor? and that seemed irritate him to the point where he said get out of the car. >> reporter: a state trooper who stopped bland is now on administrative leave. bland's family and supporters who have marched in recent days are not satisfied with the police account of her death. the local d.a. says bland may have been suffering from mental illness, pointing to a video she posted on feeb in march. >> i'm suffering from something that some of you may be dealing with right now. it's a little bit of depression as well as ptsd. >> reporter: but her sister doesn't believe that explains what happened. >> i think that people have their good days and bad days per se but in terms of any medically diagnosed clinical depression no that was not the case. >> reporter: the fbi and texas rangers are investigating the death. and the family has now ordered its own autopsy in the search for answers. charles hadlock, nbc news. take a look at these stunning pictures outside of phoenix where flash floods swept away trailers and cars late saturday after more than three inches of rainfall. flood waters rushed through the streets, wiped out sheds and filled basements in the small town of wiccanberg. more storms are possible for tonight. today the state department formally submitted the iran nuclear deal to congress which has 60 days to review the agreement beginning tomorrow. kristen welker is at the white house for us tonight. good evening. >> reporter: thomas good evening. it's going to be a conten issue 60 days here. white house officials know it will be an uphill battle to get congress to approve the deal. a fall back if congress votes it down the president wants to nail down a veto-proof majority and that means getting a number of his fellow democrats on board. opponents say the deal isn't tough enough on iran arguing it won't stop iran's nuclear program completely. the administration says the deal shuts off every pathway for iran to get a nuclear weapon fr more than a decade plus it enforces the most robust inspections program ever. and the president invited three democrats, all largely supportive of the deal to play golf with him as he tries to secure what he hopes will be a lasting part of his foreign policy legacy. >> the clock beginning tomorrow. kristen welker at the white house for us. thank you. the united states and cuba will formally re-establish diplomatic ties beginning tomorrow. the start of a historic new era after more than 50 years of hostility between neighbors. nbc's gabe grut airutierrez is in havana tonight. >> reporter: the daily grind is changing. how much have you been looking forward to this day? [ speaking spanish ] "all her life", this woman says. other cubans are more skeptical. what do you think about the amnesty over havana. >> i don't know. >> reporter: tomorrow the american embassy will officially reopen here. so will its cuban counterpart in washington where the island's flag would be hoisted. >> i never thought it would happen in my lifetime. >> reporter: this doctor is a former cuban diplomat. >> what we're watching is the two governments talking to each other, something that has not happened for the last 54 years. >> reporter: but those countries are still at odds on many issues such as lifting a trade embargo. some argue the obama administration is ignoring the castro government's human rights violations. >> the administration keeps giving and giving and giving but the castro brothers are doing nothing. >> reporter: yet a thaw in relations could drastically change anna lopez's future. she dreams of visiting the u.s. >> we have a lot to share. and i think usa have a lot to show us about the rest of the world, and that's a big world that is usa. ♪ >> reporter: that world so close and once so far tonight on the eve of a milestone 54 years in the making. so while the building behind me will once again be known as the u.s. embassy tomorrow the u.s. flag will not fly here until secretary of state john kerry visits havana later this summer. thomas? >> gabe gutierrez in havana for us. thank you. when "nightly news" continues on this sunday, one woman's moving fight for the right to die on her own terms. plus why it's never too late for a ride of passage on two caring for someone with alzheimer's means i am a lot of things. i am his sunshine. i am his advocate. so i asked about adding once-daily namenda xr to his current treatment for moderate to severe alzheimer's. it works differently. when added to another alzheimer's treatment, it may improve overall function and cognition. and may slow the worsening of symptoms for a while. vo: namenda xr doesn't change how the disease progresses. it shouldn't be taken by anyone allergic to memantine, or who's had a bad reaction to namenda xr or its ingredients. before starting treatment, tell their doctor if they have or ever had, a seizure disorder, difficulty passing urine liver, kidney or bladder problems, and about medications they're taking. certain medications, changes in diet, or medical conditions may affect the amount of namenda xr in the body and may increase side effects. the most common side effects are headache, diarrhea and dizziness. he's always been my everything. now i am giving back. ask their doctor about once-daily namenda xr and learn about a free trial offer at namendaxr.com. my heart... beats 100,000 times a day sending oxygen to my muscles... again! so i can lift even the most demanding weights. take care of all your most important parts with centrum. now with our most vitamin d three ever. you do all this research on the perfect car. gas mileage , horse power... torque ratios. three spreadsheets later you finally bring home the one. then smash it into a tree. your insurance company's all too happy to raise your rates. maybe you should've done a little more research on them. for drivers with accident forgiveness liberty mutual won't raise your rates due to your first accident. see car insurance in a whole new light. liberty mutual insurance. we are back with the heart wrenching story of a woman who is in the fight of her life for the right to die. stricken with cancer she wants the ability to die on her own terms. and this week she could get one step closer. with more nbc's hallie jackson. >> reporter: for christy o'donnell, who is 46 the most painful part of her terminal lung cancer isn't the tumors that spread to her spine and brain. it's knowing she won't be there when her daughter gets married. >> i have written her cards ten years into the future for her birthdays, for her engagement for her baby shower. >> reporter: o'donnell knows the cancer will kill her. she just doesn't know when. >> there's already been two times where i was walking after chemo, fell down wondering if that was going to be the moment knowing that my daughter was going to have to come home and find my body. no one should have to live with that. >> reporter: it's why she's demanding lawmakers give her the right to choose when and where she will die by taking prescribed medicine to end her life. >> i want to be at home in my own bed with my daughter. >> reporter: picking up the fight where brittany maynard left off. the 29-year-old made headlines last year for her decision to choose physician-assisted suicide forcing her to move from california where it's not legal, to oregon one of five states where it is. >> i would like to see all americans have access to the same health care rights. >> reporter: gallup polling shows an uptick in support for right to die laws since brittany's battle but in california it stalled. >> this is aiding killing. >> reporter: bob haas whose mother and brother died from terminal cancer believes doctors should be prolonging life not ending it. >> we look to our health care providers to give us hope. now they'd have a different role of saying take two of these and don't bother to call me in the morning. >> reporter: now taking an unusual approach o'donnell and others are suing asking a judge to allow doctors to prescribe life-ending drugs. >> it is a choice. >> reporter: she probably won't live long enough to legally make that choice for herself, but she says if sharing her story, like brittany did, can make a difference it's worth it. >> don't look at me and feel sorry for me. if a fraction of people had an opportunity to experience what i have they would be very lucky. >> reporter: after a life lived fully, a death worth fighting for. hallie jackson, nbc news santa clarita, california. when we come back the jaw-dropping moment. surfer versus shark captured on live tv. why pause a spontaneous moment to take a pill? 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>> i punched him in the back yes. >> back on shore. >> i saw him taking my board away. >> reporter: relief and shock over their narrow escape. >> he's going under. and i felt like i couldn't get there quick enough. >> just tripping out. >> reporter: the surfers didn't get back in the water. instead, sharing first place. two champions and one very close call. kelly cobiella nbc news london. wow. when we come back the unforgettable memory of learning how to ride a bike for the we are beginning a journey and at this moment we are bound by nothing. technology empowers us to achieve more. it pushes us to go further. to keep track of almost five million athletes, in 170 countries you need a lot of data. up 'til now we've been tracking a lot of data manually. the microsoft cloud allows us to immediately be able to access information, wherever we are. information for an athlete's medical care, or information to track their personal best. special olympics is really about celebrating differences, to create a world where we can accept and appreciate the gifts that we all bring to our communities. technology is the tool to make an impact. it is the tool to make a difference. with microsoft cloud we save millions of man hours, and that's time we can invest in our athletes, our work, and changing the world. going out for date night with your man is nice... ...but i think women would agree... ...snuggling up after is kinda nice too. but here's the thing: about half of men over 40 have some degree of erectile dysfunction. well, viagra helps guys with ed get and keep an erection. 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 headache, flushing 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 or hearing. ask your doctor about viagra. now available in new single packs. uhhh - i left my phone in the living room. this isn't the most efficient way for people -or air to travel. awww! ducts produce uneven temperatures and energy loss. mitsubishi electric systems offer a better way with no new ductwork.... and lower energy bills. so everyone gets exactly what they want! mitsubishi electric cooling and heating. make comfort personal. finally tonight, we all remember the moment we first took off on a bicycle without training wheels or a helping hand though some people experience that thrill sooner than others. but one new york group is teaching us it's never too late to learn how to ride. nbc's kristen dahlgren rode along. >> reporter: for most of us riding a bike is a rite of passage. but for this woman that unforgettable accomplishment came this weekend in a new york park. >> push for a little bit. >> reporter: at age 60. >> there's no words to capture how i feel right now. >> reporter: the grandmother wasn't alone. there was 23-year-old jasmine drake. >> i was riding and i just felt like a huge wave came over myself. i felt so relieved. >> reporter: and this woman who had biking on her bucket list. check? >> check off. >> reporter: and this woman hopes to ride to work. >> you learn how to -- >> to turn? minor details. >> reporter: it turns the out 8% of american adults don't know how to ride a bike. and with more people biking to work these days, adult beginner classes are popping up around the country. >> make sure your kickstand is up. >> reporter: bike new york runs this free class. >> for me it's all about empowerment. if i can ride a bike i can probably do this other thing that i want to do. >> reporter: judy de la cruz hadn't ridden in years. it turns out it is just like riding a bike. something she now understands. she plans to come back to perfect her pedaling pedaling then maybe try something else. >> the other thing i'd like to learn to do is roller blading. >> reporter: why not? she's already on a roll. >> i'm so proud of me. >> reporter: kristen dahlgren nbc news new york. proving it's never too late to learn how to have fun. that is "nbc nightly news" for this sunday. lester holt will be here tomorrow. i'm thomas roberts reporting from new york. for all of us here at nbc news, have a great night. oh my gosh, it's the guy from last night. what?! can i jump on your wi-fi? yeah, you can try it. hey! i had a really good time last night. yeah, me too. the only thing is that... the only thing is what? what's the only thing? oh my gosh he's married. he's a kleptomaniac. he's a pyromaniac. he's a total maniac. hey! hey! go back to your wife you sociopath! leave slow internet behind. the 100% fiber optics network is here. get out of the past. get fios. now $79.99 a month. go online or call now. call the verizon center for customers with disabilities at 800.974.6006 tty/v (male announcer) welcome to hollywood game night... where each week, jane lynch invites six celebrity friends over to play games... where are you going? you don't want to see instant replay on that? [laughs] (announcer) have some drinks... i did it! i'd love to turn the channel on and just come on that happening. ♪ ba-ba, ba-ba, ba-ba, ba ♪ - i just saw-- - [bang!] [people shouting] (announcer) and hopefully send one contestant home with... (jane) $25,000. (announcer) jane's house guests this week are: will arnett... mr. arnett's my mother's name. (announcer) meredith vieira... i'm trying! (announcer) katharine mcphee. [bleep]. (announcer) and on the other side of the carpet: j.b. smoove... let's get it on, baby! (announcer) melissa fumero... that one was hard. (announcer) and debra messing. whoo!