http://en.wikipedia.org/wiki/Diploma_mills_in_the_United_States
老美的文凭工厂，很多老美的公务员也买文凭，尤其是国防部的最多。
463 federal employees were discovered to have been enrolled in the three schools （ California Coast University, Kennedy-Western University, and Pacific Western University）at the time of the inquiry. The Department of Defense had the highest number of enrollees, with 257 employees registered