There’s no more difficult or uncomfortable physical challenge than holding your breath underwater for an extended period. Which is why the Air Force has long made breath holds part of its training programs for parajumpers, or parachute rescue specialists. If your duty is to pull downed military personnel from waters all over the world, you need to prove your ability to perform in the most hostile and unforgiving conditions. In this classic episode from our archives, we join a parajumper candidate who finds himself facing elimination from training for the most surprising reason: he can hold his breath way too long.

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