the purprpose is to go out and e effective n now. this is when it counts. callebs: 66 6 degrees nortrth... oyd: it's kind of dark side the moon up here. callebs: crossing toto the james pokiak: it is toh. waon: it''ll eat y you alive . >>>>t's ononof the mos dangerous eas to work. shshpe: if you are goi t to survive, you kno yououan't sit in onene spot becaususe yo'l freeze to dedeath. >> it's really one of the most bebetiful places on earth. callebs: acrcross the nortrth americanan arctic, an n array of vovoes emerge... james pokiak: we've been born inin the north a and raised inie north. oomittuk: wewe have been h herer generarations >> been up here 20 years. watson: : 24 years. >> came upup 28 years agago. cannon: i have l lived here alal my life. callebs: a terrain in transition... seeneno much change.ors have burke: t the water is changing. the land's changingng. somemeing happening here that's fferent. ivey: : what's s going on ove