Canada's electronic spy agency tracked the wireless devices of thousands of airline passengers who used the free wireless Internet available at a Canadian airport, according to a document leaked by Edward Snowden and obtained by the Canadian media. Security analysts said the collection was most likely illegal, but the Communications Security Establishment Canada said in a response it is "mandated to collect foreign signals intelligence to protect Canada and Canadians. And in order to fulfill that key foreign intelligence role for the country, CSEC is legally authorized to collect and analyze metadata."

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