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In a city where the upper classes have long lived in well-guarded communities, Cayalá might not have become the focus of an uproar if not for the protests that exploded in October around Guatemala over the ultimately unsuccessful attempts to prevent Mr. Arévalo from taking office.

Just steps away, behind Cayalá’s gates, its well-guarded residential areas, perched near a nature reserve, were eerily quiet.

He said the bottleneck evident for well-guarded nuclear weapons and the scarce resources of plutonium and uranium are constraints that do not exist for open-source software models that do not depend upon rare natural resources.

Even inside the Rainier Square complex, which on a recent day felt fancy, fresh and very well-guarded, most of the street front retail spaces are empty.

The finer manufacturing details are a well-guarded secret, and no outside cameras are allowed.