Kristjan Thorsteinson is an investigative journalist with an interest in dark networks, terrorism and espionage. He is well known on Twitter (@flightpathbook) for his corroboration of the Christopher Steele dossier, and dogged investigations of the Donald J. Trump administration’s ties to Russia.

His book, Flight Path: The Fifth Plane and the Threat to Air Force One (2014), was the first source to reveal the al-Qaeda terrorist organization’s use of a fifth plane during the 9/11 attacks. Flight Path is well sourced and explores US counterterrorism efforts abroad, with an emphasis on the activities of the US intelligence community.