More Post-Traumatic Stress: Peter Singer, the author of a new book on battlefield robotics, told LiveScience.com in May he had seen soldiers in Iraq and Afghanistan grow so attached to their bomb-disposal robots that, in one case, the soldier risked 160 feet of enemy machine gun fire to retrieve his little buddy, and in another, a soldier brought his robot in for repairs with tears in his eyes over the "injury" to his beloved "Scooby-Doo." Several units, he said, had given their robots promotions, Purple Hearts and even a military funeral.

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