"It would be right to state that, with the successful flight of the XR-4 in the summer of 1942, the helicopter became a reality in the United States."

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I think it's one of the most natural things for any human to do is to be able to run because it's that flight or fight reaction you have. You either fight or you run away. It's just a natural way for us to move.

— Zola Budd