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European intelligence services assess the three documented ships as operating “with high confidence“ on behalf of Russian interests. Their movement profiles are “very conspicuous” and show “little evidence of commercial activity.”
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...of course they know, but for whatever reason they didn't find a smoking gun so far (e.g. drones on the ships or drones taking off/landing) - or maybe they did but keep it to themselves.
> Official inspections were “symbolic”—not all containers opened
...this might to be the core of the problem.