An ex-CIA chief counterterrorism officer says his government work strained his marriage. This was the mission that tipped it over the edge.

John Kiriakou in Kabul, Afghanistan, in the early 2000s. Courtesy of John Kiriakou John Kiriakou says the secrecy of his CIA work strained his first marriage. Kiriakou's dangerous CIA mission in Athens involved combating the 17 November terrorist group. Kiriakou and his family fled after he learned the terrorist group had targeted him individually. John Kiriakou spent about 15 years at the CIA, rising to the position of chief of counterterrorism operations in Pakistan. He describes how the ...