Citizenfour review @ The Register

Once in the room, Snowden uses his “magic mantle of power”, a red blanket, to hide what he’s typing, to the bemused smirk of Greenwald…… By the end of the film, Greenwald won’t even say half the things he wants to say in the same room as Snowden, he writes them down and then tears up and discards the pieces of paper when they’re done.

The Register.