NSA whistleblower Edward Snowden arrived on Twitter last week. Within half an hour of his @Snowden account launching, he’d beaten the 72,000 followers amassed by the only feed Snowden himself is following – that of the National Security Agency itself.

He’s currently on 1.2m and rising, while his first Tweet was, “Can you hear me now?” – a jingle used by US telecoms giant Verizon in television ads. He’s right up there with our top 10 Twitter debuts…

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