U.N. inspectors failed again in talks in Tehran this week to secure a breakthrough deal on Iran’s atomic activity in a setback for diplomatic efforts to resolve the nuclear dispute with the Islamic state peacefully, Reuters reported Friday, January 18. Herman Nackaerts, deputy director general of the International Atomic Energy Agency (IAEA), said on Friday his team had not been granted the access they have long sought to the Parchin military site southeast of Tehran, where the IAEA believes explosives tests relevant for nuclear weapons development may have taken place. A further meeting was scheduled for February 12. The IAEA has been trying for a year to negotiate a so-called structured approach with Iran giving the inspectors access to sites, officials and documents for their long-stalled inquiry.