‘Arctic Ascent’ follows ‘Free Solo’s’ Alex Honnold on his latest dizzying climb

​ After feeding the collective fear of heights with “Free Solo,” climber Alex Honnold sets his sights on tackling one of the highest unclimbed cliff faces on the planet, while delivering a climate-change message for good measure. “Arctic Ascent with Alex Honnold” works on both levels (one of them really high up), while making viewers appreciate sitting on a flat, stable surface. Read More Breaking News, Latest News and Videos | CNN