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Ice climber Harald Berger has waited patiently for one of Austria's most awe-inspiring waterfalls to freeze over. 'The Supervisor' is as high as the Eiffel Tower, a cascade of frozen water that entices and threatens through its fragile beauty. But without the security of rope, Harry's ice-pick and wits are all there is between him, a thousand feet of ice and air, and a first ever free solo ascent.
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