WTF? Are we getting to unmentionable affirmative action territory here? If I was SF, I would have died before calling for a ride.
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They are climbing (exerting themselves) at altitudes far beyond where pilots sitting in cushy seats are on oxygen -- or are in pressurized cabins.
Sometimes physiology simply takes control -- I don't care how gung-ho an armchair bad@$$ you think you are...