Iran has said that foreign ministers from fifteen countries will take part in a two-day nuclear disarmament conference opening in Tehran on Saturday. <br/><br/>Talking to newsmen in Tehran, Iranian foreign ministry spokesman Ramin Mehmanparast said more than two hundred foreign guests will also take part in the conference, besides the foreign ministers. <br/><br/>He said the conference was being held following a collective will of some independent and free willed nations to genuinely confront the use of nuclear weapons in today's world.<br/>