The president-designate of a U.N. conference on nuclear nonproliferation is exploring the possibility of holding the gathering in Europe in the spring, moving up the timeline from his earlier proposal of convening the session in August, diplomatic sources said Tuesday.Gustavo Zlauvinen, who will head the upcoming review conference of the Treaty on the Non-Proliferation of Nuclear Weapons, known as the NPT, is eyeing the move based on requests from some member states for an early gathering.The NPT, joined by about 190 countries, is the world's most widely ratified nuclear arms control agreem…READ FULL ARTICLE