It is a US crime to knowingly and willfully conceal a material fact "in any matter within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States".[0]
It is a crime in the US to knowingly and willfully conceal material facts (including a singular material fact) "in any matter within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States".[0]
It is a US crime to knowingly and willfully conceal a material fact "in any matter within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States".[0]
It is a crime in the US to knowingly and willfully conceal material facts "in any matter within the jurisdiction of the executive, legislative, or judicial branch of the Government of the United States".[0]
Governments are a function of their laws. I'm not sure what you mean by, 'are allowed and expected to keep secrets from each other'.
I don't actually allow or expect my government to keep secrets. I don't think 'they' are even authorized to. If 'they' could, 'they' would not be a representative government, of, for, and by the people.
Is that all that's being transported? Communication? Those bags seem to be holding more than just text.
I'm not sure the government is actually authorized to spy, per the US Constitution. It seems that it (spying) would only be authorized as part of a military operation.