A letter from Soviet NKVD counterintelligence chief Pyotr Fedotov provides direct insight into the manipulative methods of the NKVD agent recruitment in 1940.
An obscure blogger claimed to have triangulated the general location from a photograph. On a hunch, a fellow journalist and I followed it and found the exact spot from which international investigators later concluded that Russia-backed forces fired the Buk missile that brought down MH17.