and by t frontline journalism fund, with major support from jon and jo ann hagler. and additional support from laura debonis and scott nathan, and koo and patria yuen through the yuen foundation. ♪ >> waad (speaking arabic): (babbabbling)>> am mama. mama. (singing in arabic) mama, sama. (explosion in distance) sama. (baby babbling) (man's voice speaking aric) (sama and man conversing inab ic): (indisnct conversation) (distant exploon) (nearby explosion) (footsteps on stairs, coughi) >> waad: >> man: (baby crying) (explosion) (explosion) (man shouting) >> man: (machines beeping) (explosions) >> waad: (baby crying) (group conversing) (sama babbling) (waad laughs) >> man: (making bubbling sounds) (sama laughing) >> sama. aby laughing) >> waad: ♪ (explosions) (baby crying, people shouting) (crying) ou (s of distant aircraft) aa >> (numerous explosions) >> waa (cheering) (cheering continues) ♪ >> crowd: >> waad: eople shouting) >> waad: (car horn blaring) (laughter) >> waad: (testing mic) >> waad: (testing mic) >> man (on loudspeaker): nd istinct conversations) (shouting

and by the frtline journalism fund, with major support from jon and jo ann hagler. and additional support froman kopatricia yuen, through the yuen foundation. ♪ >> durg the summer, my uncle asked me if i wanted to go, like, learn the job that he was doing. my mom wanted me to go so that can see how hard it is to work out in the sun. started a house from ttomjust to the top.ik i always lworking with my hands or just, like, learning new things. ♪ th that day that we were heading back, i was on my phone. and, hector, he starts saying that, "nah, there's... the cops are coming." (chatter on police radio) so, my uncle pulls over, and all he tells us is, "just relax, nothing's wrong." (chatter on police rad)st the cop cameted asking for our papers, if we had any idenfication, everything. >> police officer: >> yeah. >> he ok me, out he made me talk to border patrol. >> border patrol and martin: mart: al we werhandcuffed. and i started asking the cops, like, "what's happening, whatar they going to do to us?" and he just told us that we weren't supposed to be here, and becau

and by t frontline journalism fund, with major support from jon and jo ann hagler. and additional support fromr tom std lucy caldwell-stair. major support for frontline and, "in the age of ai" is provided by the corporation for public badcasting. ♪ >> narrator: this is the world'o complex board game. there are more possible moves in the game of go than there are t atoms universe. legend has it that in 2300 bce, emperor yao devised it to teach s son discipline, concentration, and balance. this ancient chinese game would industrial age.t of a new ♪ it was 2016, in seoul, sth korea. >> can machines overtake human intelligence? a breakthrough moment when the wod champion of the asian board me go takes on an a.i. program developed by google. >> (speakingorean): un >> in coies where it's very popular, like china and japan and, and south korea, to them, go is not just a game, right? it's, like, how you learn strategy. it has an almost spiritual component. k you know, if you tto south koreans, right, and lee sedol is the world's greatest go player, he's a national hero i so

and by the frontline e urnalism fund, s with majport from jon and jo ann hagler.ort for frontline andf "in the agi" is provided by the corporation for public broadcasting. captned by memea accessroup at wgbh access.wgbh.org >> for more on this and other "frontline" programs, visit our website at pbs.org/frontline. ♪ to order frontline's, "in the age of a.i." on dvd, visit shoppbs or call 1-800-play-pbs. this program is also available on amazon prime video. ♪ ♪ you're watching pbs. ♪ christiane: can you tell us what ♪ fire before us. ♪ you're the brightest. judy: turning back now to the race for the white house. ♪ you will lead us through the storms. ♪ robert: the state board of the race for election votede. thursday to set up a new election. christiane: it must be a very otional day. ♪ i will trust the promise. man: he world changed in the. yamiche: children are at the het of this story. ♪ safe to shore. c ♪ safe to shore. (singing in foreign language) - we always long for how it used to be when we were growi up. we'd use cardboard for homemade sleds. we were poor