This anniversary also recalls that during the Cold War American spies, such as Julius and Ethel Rosenberg, stole atomic secrets and sent them to Moscow.

FORBES: Fact and Comment

Withholding Smiley's voice is one of many intriguing games that the film plays in the course of a Cold War mystery about spies playing sinister games of treason and personal betrayal.

WSJ: Young Adult | Tinker Tailor Soldier Spy | Nervy 'Young Adult' Dazzles by the Book | Film Review by Joe Morgenstern

With the end of the cold war, some professional spies offered their talents to business.

BBC: I spy with my private eye.....

The world was riddled with spies during the Cold War -- but do they still exist?

CNN: Quest undercover

In an interview with The Guardian, Mendez said Harris Tweed was favoured by US spies during the Cold War.

BBC: CIA wore Harris Tweed says Argo agent Tony Mendez

German spies were hunted down and exposed during the Second World War, as were spies and other threats to American freedoms during the Cold War.

CENTERFORSECURITYPOLICY: mueller6

This catalogue of operations from the Second World War through the Cold War has been welcomed as a chance to display to the world how America's spies have spent the billions of dollars allocated to them.

BBC: Museum entrance