The alliance has no provision for the previously unthinkable: one of its members turning on another

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The idea that one Nato country could attack another – a US invasion of Greenland – is so alien that the most famous article in Nato’s founding treaty does not distinguish clearly what would happen if two of its members were at war.

Article 5, the cornerstone of mutual protection, dictates that “an armed attack against one or more” in Europe or North America shall be considered “an attack against them all”. Simple enough if the military threat comes from Russia, but more complicated when it comes from easily the alliance’s most powerful member.

The operation to capture the Venezuelan president and his wife involved at least 150 aircraft, months of surveillance – and reportedly a spy in the government

It took the US two hours and 28 minutes to snatch President Nicolás Maduro and his wife, Cilia Flores, in the small hours of Saturday morning, an extraordinary display of imperial power that plunges 30 million Venezuelans into a profound uncertainty. But it was also months in the planning.

Critical to Operation Absolute Resolve was the work of the CIA and other US intelligence agencies. From as early as August, their goal was to establish Maduro’s “pattern of life”, or as Gen Dan Caine, the chair of the US joint chiefs of staff, described it, to “understand how he moved, where he lived, where he travelled, what he ate, what he wore, what were his pets”.