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In June 2013, Laura Poitras and reporter Glenn Greenwald flew to Hong Kong for the first of many meetings with Edward Snowden. She brought her camera with her.
Citizenfour - watch online: streaming, buy or rent
Currently you are able to watch "Citizenfour" streaming on Amazon Prime Video. It is also possible to buy "Citizenfour" on Cineplex, Microsoft Store, Apple iTunes as download or rent it on Cineplex, Microsoft Store, Apple iTunes online.