The European Union has the same currency, but not the same borrowing process, between the 17 members. Some would like to change that, but Germany is against it.
The country that's considered the strongest in the eurozone had a hard time convincing investors to lay down cash for its debt today, which means the troubles going on in Europe could be entering a new phase.
Muted interest in German 10-year bonds at an auction today raised feared that investors are getting jittery even over the eurozone's strongest economy.