LONDON — Oleg Gordievsky, a Soviet KGB officer agent who helped change the course of the Cold War by covertly passing secrets ...

Oleg Gordievsky, Britain's Most Valuable Cold War Spy Inside the KGB, Dies at 86 LONDON (AP) — Oleg Gordievsky, a Soviet KGB officer who helped change the course of the Cold War by covertly ...

He was the most senior Soviet spy to defect during the Cold War. Documents declassified in 2014 showed that Britain considered Gordievsky so valuable that Thatcher sought to cut a deal with Moscow ...