Tehran is technically capable of making a nuclear bomb but has yet to decide whether to build it, a senior adviser to Iran's Supreme Leader Ali Khamenei told Al Jazeera's Arabic service on Sunday. Tehran will also directly respond against Israel should its security be targeted, the report says citing the advisor. "In a few days we were able to enrich uranium up to 60% and we can easily produce 90% enriched uranium ... Iran has the technical means to produce a nuclear bomb but there has been no decision by Iran to build one," Kamal Kharrazi said.