Reuters reports Iran has taken preparatory action to start up a uranium conversion plant it needs to fulfil an interim nuclear agreement reached with six world powers last year before the accord expires this month, diplomatic sources said. The launch of the facility would show Tehran's commitment to the landmark Nov. 24 deal as it holds talks with the United States, Russia, France, Germany, Britain and China on a long-term settlement of the dispute over its atomic aims. The major powers want Iran to significantly scale back its nuclear program to deny it any capability to quickly produce atomic bombs. Iran says its activities are entirely peaceful and want crippling sanctions lifted as soon as possible.Negotiations began in February and resumed last week in Vienna with the aim of reaching an accord to replace the interim deal. With less than ten days to go before the deadline, U.S. Secretary of State John Kerry and some of the other big power foreign ministers will join the talks this weekend.