EU leaders have gathered in the Latvian capital of Riga for a partnership summit with former Soviet countries. But so far Britain's insistence on an EU referendum and Greece's economic crisis have dominated talks.
Deutsche Welle: Grexit, Brexit, overshadow EU summit in Riga
Leaders pose for a family picture on the second day of the fourth European Union (EU) eastern Partnership Summit in Riga, on May 22, 2015 as Latvia holds the rotating presidency of the EU Council.
