The Oscar-nominated filmmaker and journalist Laura Poitras has revealed she was detained Thursday after she landed at Newark International Airport from a trip to Britain. When she landed, she was interrogated by U.S. Customs and Border Protection. Agents threatened to handcuff her when she attempted to keep notes about the interrogation. Poitras told Salon.com’s Glenn Greenwald that she is detained and questioned almost every time she returns to the United States from overseas travel. She said it is “very traumatizing to come home to your own country and have to go through this every time.” Poitras is the director of “The Oath” and “My Country, My Country.” “The Oath” was about Guantánamo prisoners returning to Yemen after being released by the U.S. government.