German Chancellor Angela Merkel is in Washington for talks with Barack Obama after Europe and the United States imposed wider sanctions on Russia.
Obama is already looking ahead to a third round of measures and has hinted at impatience with Europe, saying there had to be a united front if future sanctions on sectors of the Russian economy were to have real bite. At home, the Republicans are accusing him of weakness so will he put pressure on Merkel to move ahead in a way that the European Union has shown it is entirely unready to, at least yet?
The east of Ukraine remains in turmoil with pro-Russian separatists, who have seized civic buildings and police stations in a number of cities and towns, saying Ukrainian forces had launched a big operation to retake the eastern town of Slaviansk. That would mark the first significant military response from the government in Kiev.
The interior minister said a pilot has been killed and others wounded by anti-aircraft missiles used by the rebels. Separatists said at least one helicopter had been shot down.
In the city of Donetsk, capital of a province of about 4 million people, rebels have called a referendum on secession for May 11. The IMF has warned it would have to redesign its $17 bailout for Ukraine if it lost territory in the east.