Filmmaker Laura Poitras examines US security issues
American director to use Snowden interviews for her documentary trilogy on post-9/11 history
Sharing bylines on both sides of the Atlantic in reports on the US government's domestic surveillance activities is a woman best known as an acclaimed documentary film maker.
Laura Poitras, 49, played a key role in the Washington Post story revealing a secret National Security Agency programme that used data from internet firms with reporter Barton Gellman.
She was also part of The Guardian team with reporter Glenn Greenwald that conducted the video interview with source Edward Snowden.
There was "ongoing correspondence", without Poitras finding out who the source was. She contacted a few people, including Gellman and Greenwald.
A recipient of the MacArthur Fellowship - nicknamed the "genius grant" - Poitras had made a name for herself with the first two episodes of her trilogy documenting US post-9/11 history and the war on terror.