British Defense Secretary Michael Fallon told the United States on Monday his country would always be at Washington's side on the battlefield "when the chips are down", part of a concerted campaign to assuage U.S. fears over British defense spending.
Russia threatened to aim nuclear missiles at Danish warships if Denmark joins NATO's missile defense system, in comments Copenhagen called unacceptable and NATO said would not contribute to peace.
The United States will struggle to follow through on threats to impose deeper sanctions on the Russian energy sector, as European fears over collateral economic damage leave President Barack Obama's administration with diminished options.