Luxembourg Prime Minister Jean-Claude Junker addresses the Tamedia AG Dolder meeting 2008 in Zurich January 29, 2008. REUTERS/Christian Hartmann (SWITZERLAND)    BERLIN, Sept 17 (Reuters) – The European Union must act alone if necessary to curb bankers’ bonuses, the chairman of the Eurogroup of euro zone finance ministers, Jean-Claude Juncker, told Deutschlandfunk radio on Thursday. (more…)