This reminds me of the historical period when London and Berlin were the two technology centers of the world, in intense competition to develop the next generation of math, science, and applications to military. Most scientists in one country did not read the output of the other country, although in some cases, the Danes or the Dutch would translate interesting research.
A scientist from London visiting Berlin (and vice versa) could well expect to be surveilled by the opposite country and possibly even considered a traitor by their own.
A scientist from London visiting Berlin (and vice versa) could well expect to be surveilled by the opposite country and possibly even considered a traitor by their own.