thank you. ♪ >>> seven time grammy winner,al jarreau. d friend" celebrating duke with whom al shared so many wonderful moments. let's take a look at a cut from the cd called "summer breeze." it was originally on duke's love aware album. ♪ ♪ >> what i wouldn't have given just to be in that studio. >> it's all games in there. i call sally clark. i saw paul jackson on guitar. good lord. >> wonderful players. >> you have some friends. >> and people who came to help me do this wonderful record to celebrate the great george duke. >> george was quite an artist. take me back to the beginnings of your friendship. >> there's a record called "al jarreau and george duke live at the half note." my wife says b.c. b.c. don't forget that, al. we were there. >> right. >> people were doing other music than what we were doing. we were swimming upstream. finding an audience for this little jazzy something we were doing, testing the waters and making decisions about whether to go forward. i don't think george and i have any choice but to go forward with this

join me with mull pl grammy winner, al jarreau. that's next time.ou then. >>> the california endowment health happens in neighborhoods. learn more. >>> by contributions to your pbs station from viewers like you. thank you. >> charlie: well come to the program. we begin this evening with ian bremmer. >> the single thing that has the greatest impact makes the iran nuclear deal much less likely to happen because we realigned with the saudis and sighting with the sunni arab monarchies, our top priority is i.s.i.s., not getting an iran deal. iran's top priority is i.s.i.s., not getting a nuclear deal with the u.s. we only have five or six weeks to get the deal done, everything i've seen on the ground in iran, erdogan is going out. >> charlie: and walter isaacson, his latest book about

join me with mull pl grammy winner, al jarreau. that's next time.ou then. >>> the california endowment health happens in neighborhoods. learn more. >>> by contributions to your pbs station from viewers like you. >>> by contributions to your pbs station from viewers like you. thank you. sethi: this week on "quest"... sea otters combating climate change... sizemore: to see that change almost overnight was amazing. sethi: ...cars fueled by hydrogen... holloway: i was promised flying cars when i was a kid. this is as close as it's going to get. sethi: ...and scientists trying to build a more resilient forest. pecore: some of the best old-growth stands that we have are in the menominee tribal lands. announcer: major funding for "quest" is provided by the national science foundation. sethi: known as "science on a sphere," giant digital globes just like this one