On 14 April 2015, Sierra completed the first part of the Black Flag project at the North Pole (latitude 90º N). “The expedition travelled from the remote island Svalbard to the kinetic Russian ice base Barneo, using a network of private tourism and logistical support companies to complete the journey,” says a statement from a/political, the London-based non-profit organisation behind the project. The project initially appeared impossible because of the “complexity, cost and subject matter”, Sierra says. Santiago Sierra's North Pole Documentation (2015). Courtesy of Santiago Sierra Studio & a/political