BERLIN, GERMANY - JUNE 24:  German Chancellor Angela Merkel greets British Prime Minister David Cameron upon his arrival for talks at the Chancellery on June 24, 2015 in Berlin, Germany. The two leaders are meeting as creditors, European Union officials and members of the Greek government scramble to find a solution to avoid a Greek state bankruptcy and departure by Greece from the Eurozone.  (Photo by Sean Gallup/Getty Images)