SAN Francisco International Airport, United States, Sunday January 15, 9pm local time. Sitting in a waiting room was a man with a clean-shaven, yellow-skinned face. The three women sitting beside him had similar complexions. They chatted while waiting for the departure of a flight to Hong Kong.

They were unaware however, that their movements were under the continuous surveillance of six Federal Bureau of Investigation (FBI) agents and a man of Mal