South China Morning Post senior reporter Lana Lam was the only Hong Kong journalist to interview Edward Snowden during the whistle blower's brief stay in the city in 2013.

One year after the former NSA contractor broke cover in Hong Kong and revealed how US spy agencies tap into the communication of governments and individuals the world over, we revisit those dramatic weeks with behind-the-scene stories and in-depth analyses on how those explosive revelations change the world around us.

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