"People do have their own stress reactions, especially people who maybe shouldn't be in the field, " Rothbaum said.

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What's more, the lightweight cans didn't audibly creek, crack, or stress as we pulled on their headband, yielding springy, but gentle reactions to pressure.

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One such program, called the Warrior Stress Reset Program, is "designed to help address those common and normal reactions to war experiences, " says a military Web site.

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