A curious public information film aimed at US students planning to visit and study in China, in part for the methods, but also the timing of the release now - as teh subject was arrested in June 2010:
The "Game of Pawns: The Glenn Duffie Shriver Story" video dramatizes the incremental steps taken by intelligence officers to recruit Shriver and convince him to apply for jobs with the U.S. State Department and the Central Intelligence Agency.
Link to YouTube film (28 mins):https://www.youtube.com/watch?v=R8xlUNK4JHQ

Or the official FBI link:http://www.fbi.gov/news/news_blog/st...ligence-threat

Or Wiki:http://en.wikipedia.org/wiki/Glenn_Duffie_Shriver