Canada's international spy agency, CSEC, tapped into the free Wi-Fi service at a major Canadian airport to track the comings and goings of cellphone-carrying travellers for two weeks, according to documents obtained by CBC News. It was apparently part of a trial run to see how wide an electronic net could be cast.

A top secret document retrieved by American whistleblower Edward Snowden reveals Canada has set up covert spying posts around the world and conducted espionage against trading partners at the request of the U.S. National Security Agency.