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A Failure of Intelligence, by Freeman Dyson

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A Failure of Intelligence, by Freeman Dyson
Topic: History 8:17 pm EST, Dec  4, 2006

So you like war stories, but you're getting tired of reading about IEDs in Iraq? Then let Freeman Dyson take you back to the dark days of the 1940s.

My first day of work was the day after one of our most successful operations, a full-force night attack on Hamburg. For the first time, the bombers had used the decoy system, which we called WINDOW and the Americans called CHAFF. WINDOW consisted of packets of paper strips coated with aluminum paint. One crew member in each bomber was responsible for throwing packets of WINDOW down a chute, at a rate of one packet per minute, while flying over Germany. The paper strips floated slowly down through the stream of bombers, each strip a resonant antenna tuned to the frequency of the German radars. The purpose was to confuse the radars so that they could not track individual bombers in the clutter of echoes from the WINDOW.

That day, the people at the ORS were joyful. I never saw them as joyful again until the day that the war in Europe ended. WINDOW had worked. The bomber losses the night before were only 12 out of 791, or 1.5 percent, far fewer than would have been expected for a major operation in July, when the skies in northern Europe are never really dark. Losses were usually about 5 percent and were mostly due to German night fighters, guided to the bombers by radars on the ground. WINDOW had cut the expected losses by two-thirds. Each bomber carried a crew of seven, so WINDOW that night had saved the lives of about 180 of our boys.

... Within a month, loss rates were back at the 5 percent level, and WINDOW was no longer saving lives.

This story continues with Part II.

A Failure of Intelligence, by Freeman Dyson



 
 
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