Alex Honnold scales 508m skyscraper without safety equipment

American climber Alex Honnold has successfully scaled a Taiwan skyscraper without a rope, harness or safety equipment. The building, named Taipei 101 for the number of its floors, is 508m (1,667ft) tall, made of steel, glass and concrete and is designed to resemble a stick of bamboo. Honnold completed the climb in one hour and 31 minutes on Sunday - and celebrated the achievement with one word: "Sick." His time more than halves the record of the only other person to scale the tower.