Citizenfour’s Laura Poitras suing US government over ‘harassment’The Oscar-winning documentary film-maker Laura Poitras is suing the US government demanding to know why she has repeatedly been subjected to “Kafkaesque harassment” at airports across the world. Poitras, 51, said she had been held at borders more than 50 times between 2006 and 2012, often for hours at a time.