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Official U.S. Air Force: Saving lives
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Official U.S. Air Force: Groupcheck
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Official U.S. Air Force: Preserving life, limb and eyesight
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Official U.S. Air Force: Defending freedom
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Official U.S. Air Force: Halt!
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Official U.S. Air Force: Simulated attack
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Official U.S. Air Force: Barbed wire