>>f: former senator tom harkin, andy card. thank you both. >> thank you. >> woodruff: as we reported earlier, c.i.a. director gina haspel today briefed a dozen u.s. senatorabout the october murder of a saudi arabian journalist. the saudi government claims the murder was a "rogue operation." but the senators who were briefed believe responsibility lies near the very top of the saudi royal family, with the powerful crown prince, muhammad bin salmown as mbs. here are republican senators bolindsey graham and who's chairman of the senaon foreign relacommittee. >> i have zero question in my mind that the crown prince, m.b., ordered the killing, monitored the killing, knew actly what was happening planned it in vance. if he was in front of a jury, he would be convicted in 30 minutes, guilty. >> there's not a smoking gun. there's a smoking saw. u have to be willfully blind not to come to the conclusion that this was orated and organized by people under the command of m.b.s., and that he was intracently involved in the demise of mr. kh

senator tom harkin, welcome to u. >> thank you. >> woodruff: you met president r?sh when he was at what point in his car >> well, actually, when he was hce president, but in any meaningful way whwas president. that's really when i first began to deal with him. >> woodruff: was it the americans with disabilities act that brought y together? >> well, actually, the first time i was in my office on a friday afternoon, and i got a call from the white house, my assistant did, aaid the president wanted to have some people down for drinklater in the afternoon, he wanted you to go down. i said, sure. so i went down to the white house. it was a friday afternoon. barbara was gone. we had a bunch of guys down, and he made martinisor all of us. and he took us on a personal tour of the white house, fi hrst time ever been in the private quarters. so it was a social event, and he was just the nicest person in e world. that was my first social interaction with him. >> woodruff: so we're talking about a republican president iiting a democratic senator to come over to the white house

just a tremendous achievement done by former senator tom harkin, democratic senator from iowa at thet walks into any place of public accommodation, any public place if there's an tell voige elevat there's a ramp, this is because of the american with disabilities act. >> i remember covering it. it was controversial. it's going to cost money. and now you look back and you can't believe it was that controversial. it's one of those things where we can accommodate and it turned out more than accommodate. thrive. >> what that's opened up to for a whole community of people. >> of course george bush 41 ending in a wheelchair which was very difficult for him. he was so active. we would tease him about his aerobic golf. >> a college athlete. >> jumping out of an airplane for his 85th and 90th birthdays. when i saw him the first time in the wheelchair, he said i got the parkinson's thing and it's to my legs but the brain is still good. which indeed it was. >> this, of course, on the left side of your screen here, the processional. the hearse carrying the cassette makie i -- casket along the str

that letter was written by lieutenant tom harkin. [applause] hope: it is my privilege to introduce our speaker tonight. bill barry has served as the chief historian of nasa since 2010. he collects and researches material, answers questions from the public, and disseminates the history in a variety of ways. nasa after 22 years in the air force where he served on the faculty of the air force academy. he received his doctorate from oxford in 1996 for his dissertation focused on soviet andile design bureaus manned space policy during the 1950's and 1960's. he recently served as a consultant for the films, "first man" and "hidden figures." dr. bill barry. [applause] dr. barry: thank you. thank you for the warm hospitality i have enjoyed. i have been stunned and happy about how much people of wanted to talk about space and space exploration. i have been the space nerd since i was four years old. it is great to share my enthusiasm with you tonight. on october 1, 1958, nasa opened for business. 60 years ago a month ago. we have been celebrat