Filling the tank at 21,000 feet

It's even tougher if you do it Bob Haymond's way - on your stomach in the rear of an Air Force KC-135 Stratotanker flying at 21,000 feet and 300 miles per hour, while you work the controls of a 40-foot fuel hose as it plunges toward a second military plane flying so close you could spit on it.

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