Here's what the streaming giant is doing to keep the "Free Solo" star safe — and what will happen if something goes wrong.

Later today (well, tomorrow in Taiwan), "Free Solo" climber Alex Honnold will start his ascent on the 1,677-foot Taipei 101 skyscraper - without ropes - by carefully making his way up the tower's slab ...

While Alex Honnold has long been a legend in the outdoor community for his mastery of "free soloing"-- climbing without ropes ...