A closer look at recently declassified MI5 files on the intelligence failure surrounding the five "Cambrdige spies" ...

14 (UPI) --Documents newly declassified by MI5, Britain's internal intelligence ... that a member of her staff had spied for the then-Soviet Union. The secret files record how the country's ...

The files about royal art historian Anthony Blunt are among a trove from the intelligence agency MI5 released Tuesday by Britain's ... whose members spilled secrets to the Soviet Union from the heart ...

marking the death of Soviet Union President Yuri Andropov. Classified documents released Tuesday by Britain's MI5 50 years on reveal the extent of communist-era espionage involving the country's ...

Blunt was a senior MI5 officer during World War II and passed ... He was questioned several times after Maclean and Burgess fled to the Soviet Union in the 1950s. But without a confession, he ...

MI5 initially decided to keep the queen in ... and Donald Maclean—all of whom ended up defecting to the Soviet Union. It also includes dozens of files related to John Caincross, the fifth ...

The files about royal art historian Anthony Blunt are among a trove from the intelligence agency MI5 released Tuesday ... whose members spilled secrets to the Soviet Union from the heart of ...

Historian Christopher Andrew says in the official history of MI5 that the queen had previously ... whose members spilled secrets to the Soviet Union from the heart of the U.K. intelligence ...