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Earth radius

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Earth radii are sometimes used to measure distance. The radius of Earth is ~ 6,378 km. This distance is usually denoted by R_E.

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List of intelligence agencies

... (SNI) (Defunct) Bulgaria Durzhavna Sigurnost[?] (DS) Canada Canadian Security Intelligence Service[?] (CSIS) http://www.csis-scrs.gc.ca/ Communications ...