Question, containing spoilers
In the end John Preston confronted Sir Nigel Irvine and General Karpov. He said that General Karpov helped them in locating Valeri Petrofsky / James Edward Ross. In exchange he would get the proof he needed to bring down Govershin, and take his place. What exactly was this proof? They must have given him something solid, or else he could just have confronted Govershin himself, not involving the brits.
Imagine a rhyme in it's prime, from off the baselines
Skyscraper verticals, support the hang time