WE'RE getting all the feathers," said a frustrated U.S. army officer in Cambodia's jungled Fishhook sanctuary last week, "but we still haven't got the bird." The elusive bird is COSVN, the Communists' celebrated Central Office for South Viet Nam, and it has flown the coop every time the allies have gotten close. Pressed for the latest news on the hunt, an Administration aide wryly told reporters: "We found something that looks like this, but we aren't sure what it is." Then, deadpan, he picked up a writing pad and sketched a large five-sided building that strikingly resembled the Pentagon.
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Despite the impression...