For most of us, clambering onto the wing of an aircraft traveling at high speed several thousand feet above the ground sounds like complete idiocy. But for some intrepid individuals, this is just how they make a living. Welcome to the daredevil world of wing walking. One of the most dangerous aerial stunts ever devised, wing walking is the ultimate in extreme sports. But it's not a modern-day phenomenon. In fact, this extraordinary display of airborne antics is grounded in the barnstorming days of the 1920s.
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