Cedar Falls, Iowa. Last week we went to visit Don Briggs, an instructor at the University of Northern Iowa who has a passion for creating waterfalls on the sides of grain silos in order to climb them. This video was the first in a series of short documentary films that I produced for The World Triathlon, an attempt by Charles Wittmack of Des Moines, Iowa, to swim the English Channel, ride his bicycle to Kathmandu, and then climb Mount Everest.

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