It’s getting harder to climb a skyscraper. Blame architecture. Last Saturday, more than six million people held their breath as Alex Honnold took his first step up Taipei 101. The Free Solo climber, who went on to ascend Taiwan’s tallest building without the safety of a rope and harness, drew crowds all around the building, as well as on Netflix, where the ascent was live-streamed as part of a show called Skyscraper Live.