Gordon Corera is the author of Russians Among Us: Sleeper Cells, Ghost Stories, and the Hunt for Putin's Spies. He has been a security correspondent for BBC News since 2004, and has reported from across the United States, Asia, Africa, and the Middle East. He is the author of Cyberspies: The Secret History of Surveillance, Hacking, and Digital Espionage; The Art of Betrayal: The Secret History of MI6; and Shopping for Bombs: Nuclear Proliferation, Global Insecurity, and the Rise and Fall of the A.Q. Khan Network. He was educated at Oxford and Harvard universities, and lives in England.