The US president's latest threats will baffle the leaders of allied nations, writes the BBC's economics editor.
Final preparations now get underway for the first crewed mission to the Moon in more than 50 years.
Even the iPhone, long considered the preserve of the youth, has been recast as a tacky trademark of Young 40s.
The US president says several European allies opposed to his plans to buy Greenland will face 10% tariffs from February.
