If close relationships trigger attachments that ground people, then a phone is a constant source of reinforcement as it consistently dispenses rewards.

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Through chat windows, they exchange data, update intelligence reports and talk in real time with commanders on the ground, including troops whose lives may depend on the constant and rapid flow of information they get from Langley.

NPR: AP IMPACT: Combat Stress Felt Far From Front Lines

Because I've been working down there for nearly a year as the U.N. special envoy, I've been in constant touch with our people through the U.N. on the ground, and you know we lost a lot of our people there -- the largest loss of life in the history of the United Nations on a single day.

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