Despite talk of a deal over Greenland, it will be hard for US allies to return to business as usual, writes the BBC’s diplomatic correspondent.

Transatlantic relations aren't broken, though they are damaged. And if Europeans want to try to cut through with Trump, they'll have to stick together, writes Europe Editor Katya…

The argument over Greenland has threatened to reignite a trade war with Europe and upend the NATO alliance that underpins Western security.