reiman showed us the results. >> eric reiman: this is somebody who doesn't have the gene.s in the brain. >> stahl: but in members of the family with the mutation, it was a different story. >> reiman: extensive amyloid deposition in the brain. >> stahl: that's the red. >> reiman: red is more amyloid. but yellow is also amyloid. >> stahl: this brain had even more. the images showed that amyloid plaques build up in the brain more than a decade before memory loss begins. so if a drug could remove that red and yellow, maybe the disease could be prevented. banner developed a plan for a multi-million dollar drug trial, and convened a meeting with leading scientists, pharmaceutical companies, and representatives of the n.i.h. >> tariot: the end of the meeting, each scientist was allowed to say one closing thought. and francisco had the last word. >> stahl: lopera? >> tariot: and he paused a long time. and you could hear a pin drop in the room. >> lopera: i said to them, "we-- the families are waiting for you." >> stahl: "they're waiting for you." >> tariot: that's the point when,

johnny cash had a tv show filmed live at the reiman in 1969. we have the handwritten lyrics to jolene from the great dolly parton. dolly parton was writing songs in nashville at the age of 14. commuting back and forth from severeville, tennessee with her uncle bill. she officially moved to nashville in 1964 when she was 18 years old. by 1967 dolly was on the poor tar wagner tv show and that's where america really got to know dolly parton. and this particular suit she war when she was finally inducted as a member of the grand ole opry in 1969. these are the pieces that make this museum so special. liz: leland you get a sense of the evolution of country music. it's not just the music that's there, it's the clothes that these artists wore. it's the cars that they drove. it's pieces that they wrote. so it's really a fascinating museum. if you ever get a chance to come to nashville i suggest you do it and get caught up on your country music history. leland: yeah, well, the history for sure. some good barbecue and good town nashville is we are all je

here to break down the body language of the g-20 summit is body language expert tonya reiman.o when we watch this. you have to realize trump is a very dominating force. and he used certain tactics in order to put you into the right frame. typically if you watch this handshake, it's a regular handshake. didn't do anything other than tap underneath putin's arm. normally what he will do is grab you and pull you in. what that does is takes you off your footing, psychologically makes him more powerful. he didn't attempt to do that. what i liked about this handshake not only did it come across as respectful. in order to maintain the power did he a double pat. that pat is hey i still have the authority. i'm still the more dominant force. todd: how did putin physically respond there is a height difference. height is equivalent to power. normally once again trump would pull in so can he demonstrate that height. putin pulled back. he stood up straight. he has very good posture he made sure he shook hands and with this part he doesn't do anything except stand up straight. accept the hand