Germany's Chancellor Angela Merkel stepped into a diplomatic row that began when a senior US official was secretly recorded insulting the European Union.
Victoria Nuland swore about the EU during a conversation with the US Ambassador to Ukraine.
The exchange was apparently bugged and has since been posted online, with the Americans blaming the Russians.
ITV News Washington Correspondent Robert Moore reports:
More top news
Lorries are being parked on the M20 again as a "heavy volume" of traffic heading for Europe led police to reintroduce emergency closures.
The world's top scientists have called for a ban on autonomous weapons and "killer robots" that can attack targets without human control.
Growth figures published today are set to show the economy bouncing back after a weak start to the year.