Iran's government sees its nuclear program as "defensive" and will push forward with it, a government official told France's foreign minister on Monday. "Our missile work is... in line with our defensive policy, which poses no threat to any country," the secretary of Iran's Supreme National Security Council, Ali Shamkhani, told Jean-Yves Le Drian, according to the Students News Agency ISNA.Earlier, the semi-official Tasnim news agency quoted an Iranian armed forces spokesman as saying: "Iran's missile program will continue non-stop and foreign powers have no right to intervene on this issue."France's foreign minister visited Iran on Monday on a delicate mission to affirm Europe's support for a nuclear deal that opened Iran's economy while echoing U.S. concern about Tehran's missile program and role in regional conflicts.Le Drian aims to save the 2015 nuclear deal, which US President Donald Trump has threatened to quit unless European allies help "fix" it by forcing Iran to change its behavior in other areas."We're not going to be Donald Trump's envoys or Iran's defense lawyers," said a French diplomatic source. "We have our own concerns and will talk to the different sensibilities of the Iranian system to get our point across."France says Iran must address concern over its ballistic missile program or risk new sanctions. Iran's missile program is not covered by the nuclear deal, and Tehran says it will not bow to pressure to halt it.Hardline media reacted angrily to Le Drian's visit with headlines like "Rude guest" and "Weapons of mass seduction." Fars news agency said a group of hardliners gathered at Tehran's International Mehrabad Airport to protest Le Drian's visit.The 2015 accord between France, Britain, Germany, Russia, China and the United States gave Iran relief from economic sanctions in return for curbs to its nuclear program, allowing Tehran to talk trade with Europe for the first time in years.ECONOMIC BENEFITS SLOW TO ARRIVEBut so far the deal, pragmatist President Hassan Rouhani's headline achievement, has yet to bring the economic benefits many Iranians yearn for. That has slowed Rouhani's efforts to engage with the West, opposed by allies of Iran's top authority Supreme Leader Ayatollah Ali Khamenei.France has been quick to restore trade ties. Planemaker Airbus, oil major Total and automobile manufacturers Peugeot and Renault have signed deals, all at risk if Trump walks out of the accord.In an effort to keep him on board, French President Emmanuel Macron has criticized Iran's missile program and raised the possibility of new sanctions. On the eve of Le Drian's visit, Macron told Rouhani by phone that France expects Iran to make a "constructive contribution" to solving crises in the region.Tehran supports Syrian President Bashar al-Assad against rebels, including groups backed by the West, and backs Israel's enemy Hezbollah in Lebanon.France wants Washington to see the nuclear deal separately from Iran's regional activities and missile program, and Le Drian will stress Macron's commitment to the accord.Le Drian also met Iranian Foreign Minister Mohammad Javad Zarif and was due to meet Rouhani.An official close to Rouhani said Iran "has always been open to talks and to resolve issues through diplomacy ... but this does not mean we will yield to unjust pressure over our inevitable rights, whether defensive or anything else."While France says Iran is sticking to the terms of the nuclear deal, it argues that it may be violating part of the U.N. resolution enshrining the accord. The resolution calls on Tehran to refrain from work on missiles designed to carry nuclear warheads, although this is not in the accord itself."On the ballistics, the Iranian program is not compatible with (the resolution) and we have a particular concern on the transfer of know-how of ballistic capacity to regional actors and by that we mean Hezbollah," the diplomatic source said.