British Foreign Secretary William Hague attends an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)

German Foreign Minister Guido Westerwelle (L), EU Commissioner for Enlargement and European Neighbourhood Policy Stefan Fule (C) and Sweden Foreign Minister Carl Bildt talk during an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)

German Foreign Minister Guido Westerwelle attends an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)

German Foreign Minister Guido Westerwelle (L), Sweden Foreign Minister Carl Bildt (C) and EU Commissioner for Enlargement and European Neighbourhood Policy Stefan Fule talk during an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)

Belgian Vice Prime Minister and Foreign Minister Didier Reynders attends an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)

European Union High Representative for Foreign Affairs and Security Policy Catherine Ashton attends an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)

European Union High Representative for Foreign Affairs and Security Policy Catherine Ashton attends an EU foreign ministers' meeting in Luxembourg, April 22, 2013. (Xinhua/Ye Pingfan)