senior diplomat of the EU, Ali Shamkhani, Iran's top security officer, declared that Iran would continue to advance its nuclear program until the West modifies its "illegal behavior." On July 9, 2022, according to an IAEA report seen by Reuters, Iran has increased its uranium enrichment through the use of sophisticated equipment at its underground Fordow plant in a configuration that can more quickly vary between enrichment levels. In September 2022, Germany, United Kingdom and France expressed doubts over Iran's sincerity in returning to the JCPOA after Tehran insisted that the IAEA close its probes into uranium traces at three undeclared Iranian sites. The IAEA said it could not guarantee the peaceful nature of Iran's nuclear program, stating there had been "no progress in resolving questions about the past presence of nuclear material at undeclared sites." United Nations Secretary-General António Guterres urged Iran to hold "serious dialogue" about nuclear inspections and said IAEA's independence is "essential" in response to Iranian demands to end probes. On October 22, 2022, the Iranian hacktivist group Black Reward leaked 50 gigabytes of internal emails, contracts, and construction plans related to Iran's Bushehr power plant. The group stated that they released the documents after the government failed to respond to their demand of releasing the protestors arrested during the Mahsa Amini protests, whom Black Reward described as political prisoners. Iran's civil nuclear arm acknowledged that hackers had breached their email system, which was being used by the Nuclear Power Production and Development Company who operates the country's sole nuclear power plant in Bushehr. In February 2023, the IAEA reported having found uranium in Iran enriched to 84%. The Iranian government has claimed that this is an "unintended fluctuation" in the enrichment levels, though the Iranians have been openly enriching uranium to 60% purity, a breach of the 2015 nuclear deal. It is still lower than the 90% enrichment required to produce weapons-grade uranium but is much higher than the 20% required for energy uses and research. Research and development in nuclear weapons The continuing controversy over Iran's nuclear program revolves in part around allegations of nuclear studies by Iran with possible military applications until 2003, when, according to the 2007 National Intelligence Estimate, the program was ended. The allegations, which include claims that Iran had engaged in high-explosives testing, sought to manufacture green salt (), and design a nuclear-capable missile warhead, were based on information