Repeat: According to the Institute for Science and International Security, IAEA records show that between the end of 2009 and early 2010 about 1,000 centrifuges at Natanz  had to be replaced.
According to the Institute for Science and International Security, IAEA records show that between the end of 2009 and early 2010 about 1,000 centrifuges at Natanz  had to be replaced.