The two travelers looked like typical American tourists as they ambled along Rome's Via Veneto. Then an alarm watch jangled on one man's wrist.
"What on earth do I do now?" he asked.
His companion, an Air Force psycholo gist named Sheldon Freud ("a very dis tant cousin of Sigmund fifth or sixth"), answered promptly: "Sit down and we'll order coffee." While they sipped their coffee at Doney's, the first man checked the dial on a small instrument hooked to his belt. He was noting his temperature. There was a wire leading from the gauge down his trousers to a...
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