Oil Espionage How the NSA and GCHQ Spied on OPEC

America's NSA and Britain's GCHQ are both spying on the OPEC oil cartel, documents from whistleblower Edward Snowden reveal. The security of the global energy supply is one of the most important issues for the intelligence agencies.
Von SPIEGEL Staff
An OPEC press conference in Vienna, Austria, in 2010

An OPEC press conference in Vienna, Austria, in 2010

Foto: ? Heinz-Peter Bader / Reuters/ REUTERS