to find out our reporter christiana coleman headed out with a team to follow the route of her mother's expedition in south america. the trip took them to ecuador and colombia. in part one they climbed chimborazo an active volcano that is as much a challenge today as it was in how much time. 4000 readers above sea level on the north face of chimborazo the legendary volcano that and you know to prove don't enter mountable challenge for alexander. garcia wants to take us to the summit. our team is struggling with the thin air at this altitude and we still have hours of ascent to head of us we're following the route taken 2 centuries ago by the famous explorer and naturalist. i really question about timing and i'm really passionate about being in one thing so of course 200 years ago if someone has arrived here and discovered this area and the like of course you fall in love with the lead in one thing. they can see how he was thinking how he can get to the top if you imagine he didn't know how high eighty's and just feel enough to go up and fight the measure the mountain and try to be enoug