The U.N. International Atomic Energy Agency (IAEA) said on Thursday in its quarterly report on Iran that the country has doubled the number of uranium enrichment machines to 2,140 from 1,064 in May. The machines, buried deep in an underground bunker to withstand any attack, were not yet operating, according to the report. “… as Iran is not providing the necessary cooperation… the Agency is unable to provide credible assurance about the absence of undeclared nuclear material and activities in Iran, and therefore to conclude that all nuclear material in Iran is in peaceful activities,” the report said. Iran's supreme leader reiterated this week that Iran's nuclear program was totally peaceful. "Our motto is nuclear energy for all and nuclear weapons for none," Ayatollah Ali Khamenei said. Iran has claimed that it needs this material for a medical research reactor, but it also takes it closer to making potential bomb material.