US psychological warfare expert Colston Westbrook, in 1966, begins a three-year tour as advisor to the Vietnamese Special Police Branch under the cover of working as an employee of Pacific Architects and Engineers, the firm contracted to construct forty-four Provincial Interrogation Centers, interrogation/torture centers erected in Vietnam as part of the CIA’s soon-to-be-launched Operation Phoenix.

Westbrook had formerly served as a US advisor to the Korean Central Intelligence Agency.