| http://www.w3.org/ns/prov#value | - Around the world, electronic messages are intercepted by a collaboration amongst several spy agencies headed by the American NSA, termed ECHELON. Based upon a document known as the UKUSA Agreement, signed in 1948 by the U.S., Great Britain, Australia, Canada, and New Zealand, ECHELON is a system composed of receiving stations in Yakima, Washington; Sugar Grove, West Virginia; Norwenstow in Cornwal
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