But they're no runt of the litter - the Air Force has the highest budget of the four branches, and its operational capabilities are robust and exciting.
In short, the Air Force is way tougher than you think.
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Geoffrey Ingersoll and Brian Jones contributed to this report.
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![Why The US Air Force Is Way Tougher Than People Think [PHOTOS]](/thumb/msid-60085318,width-65,height-47/default-thumb.jpg "Why The US Air Force Is Way Tougher Than People Think [PHOTOS]")