A customer uses a computer at an internet cafe in Tehran. (Photo: REUTERS/Raheb Homavandi)

A customer uses a computer at an internet cafe in Tehran.

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Photo: REUTERS/Raheb Homavandi

A few hours later the sites were blocked again.

The government cited "technical problems" as the reason for the temporary access.

Anchor Aaron Schachter speaks with Zeynep Tufekci, Assistant professor at the University of North Carolina, Chapel Hill, about the inner workings of Iranian Internet.

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