Iran has tested missiles near the Strait of Hormuz, as preparations are made to impose further economic sanctions over Tehran's nuclear programme.
Mark Fitzpatrick, director for non-proliferation programme at the International Institute for Security Studies, told the Today programme that the missile tests were not military significant but the country showing that they will "not succumb easily".
Iran is making progress on several fronts, he adds, most significantly it is moving part of it uranium enrichment programme into a well defended facility.
If a significant amount is moved, Mark Fitzpatrick explains, this could present a "point of no return" for countries concerned about Iran's programme.
Iran's ability to produce nuclear weapons within a matter of months will put Israel at a "decision point" by the end of the year, he believes.
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