TOM CLANCY OR JOHN LE CARRE might hesitate at making credible fiction of this tale. Imagine that the Vietnamese government signs a contract with an American researcher to write a book on the Vietnam War, using secret archives that Hanoi has insisted for 20 years do not exist. Then suppose that the American volunteers this information to the Pentagon, which first rebuffs him, then takes him in, only to discover that the evidence represents a genuine breakthrough in the decades-long effort to identify Americans missing or captured in Vietnam.
This is exactly what has happened since Ted Schweitzer, 50, a U.N....