Canada's Information and Privacy Commissioner has released a very useful and detailed document titled: Checking In;  Your Privacy Rights at Airports and Border Crossings.  It summarizes the various privacy and security processes in effect today for Canadian travellers.  Included is an easy-to-read outline of relevant information on secondary searches, the "no-fly" list, and a variety of other issues.  An informative read, and also a helpful guide for individuals concerning what checks and balances exist within this complex system involving law enforcement, customs, and a network of international collaboration.

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