Cockcroft missed Kurchatov's visit because he had left for the US to press for declassification of the fusion work, as there was now widespread belief on both sides of the Atlantic that sharing their findings would greatly improve progress.
Cockcroft missed Kurchatov's visit. There was now widespread belief on both sides of the Atlantic that sharing their findings would greatly improve progress. He had left for the US. This was to press for declassification of the fusion work.