Science: Big Jim

A group of Navy electronics men was tramping through a forest on the coast of Washington. "Suddenly," reported one of them, "the woods opened up as if we had come to Shangri-La." On either side of a fine little stream—Jim Creek—stood a 4,000-ft. mountain. It was just what the Navy was looking for. Last week, more than eight years later, the bears and cougars had been driven away from Jim Creek and much of the forest was gone too. In its place stands the world's most powerful radio transmitter.

Six 200-ft. towers, painted red & white, crown each of the two...

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