Buster Martin just became the second person to clip the chains of the two routes in contention for being the world’s first 9a (5.14d).
Free soloing means climbing with no rope, a genre that verged into American consciousness in the 1970s. In 2018 it blew up, with Alex Honnold's mind-bending solo of El Capitan and the award-winning film that chronicled it. Let's take a look back.
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