The Shahab-3 is a family of liquid-fueled ballistic missiles developed by Iran, under the IRGC, and based upon the North Korean Nodong-1/A and Nodong-B missiles. The Shahab-3 family has a range of 1,000-2,000 kilometres (1,200 mi). It was tested from 1998 to 2003 and added to the military arsenal on 7 July 2003, with an official unveiling by Ayatollah Khamenei on July 20. It has an estimated accuracy of about 2,500m CEP. According to the IAEA, Iran in the early 2000s may have explored various fuzing, arming and firing systems to make the Shahab-3 more capable of reliably delivering a nuclear warhead.