Check this out:

DSS: Defense Security Service (US)

A U.S. government defence agency has suddenly retracted its claim that Canadian coins containing tiny transmitters were planted on three American contractors who visited Canada.

http://www.hamiltonspectator.com/NAS...=1112101662670

MI5

London-- MI5 has discovered that British defence contractors travelling to Canada to discuss "sensitive contracts" have been bugged by Chinese secret agents.

http://www.canadafreepress.com/2007/thomas011607.htm

Whom do you trust? It seems like DSS embarrassed themselves twice.