WOW. Some random quotes:
«U.S. officials were even more alarmed when Wagner hired a gifted electrical engineer in 1978 named Mengia Caflisch. She had spent several years in the United States working as a radio-astronomy researcher for the University of Maryland before returning to her native Switzerland and applying for a job at Crypto. Wagner jumped at the chance to hire her. But NSA officials immediately raised concerns that she was “too bright to remain unwitting.”
The warning proved prescient as Caflisch soon began probing the vulnerabilities of the company’s products.
To the CIA, Widman had an even more important attribute: an affinity for the United States that he had formed while spending a year in Washington state as an exchange student.»