Iran has deployed the Russian-supplied S-300 surface-to-air missile defense system around its Fordow underground uranium enrichment facility, Iranian state media said Aug. 29, Reuters reported. A commander of the Islamic Revolutionary Guards Corps’ air defense force said the priority of thedefense system was only to protect the nuclear site. Iran and six world powers reached a deal in 2015 aimed at curbing Iran’s nuclear program in exchange for lifting economic sanctions imposed on Tehran over its disputed nuclear work. Enrichment of uranium at the Fordow facility, around 100 kilometers (60 miles) south of Tehran, has stopped since the implementation of the nuclear deal. Russia in 2010 canceled a contract to deliver S-300s to Iran, but Russian President Vladimir Putin lifted that self-imposed ban in April 2015, providing much-needed defense equipment to Iran’s military. In August, Iran said that Russia had delivered main parts of the system to the country, adding that it would be delivered in its entirety by the end of 2016.