Iran is probably capable of producing enough fissile material for use in a nuclear weapon within “one or two weeks,” US Secretary of State Antony Blinken said on Friday. “They haven’t produced a weapon itself, but that’s something of course that we track very, very carefully,” Blinken said at the Aspen Security Forum in Colorado. Tehran had committed to restricting its nuclear programme in a landmark treaty in 2015, but former US president Donald Trump withdrew from the agreement in 2018, imposing harsh economic sanctions. In return, Iran resumed uranium enrichment and restricted inspections b…