After Chief Martial Law Administrator (later president) and Chief of Army Staff General Zia-ul-Haq came to power (see Operation Fair Play), further advancements were made to enrich uranium and consolidate the nuclear development programme. On March 11, 1983, the PAEC under Munir Ahmad Khan carried out the first successful cold test of a working nuclear device near at the Kirana Hills under codename "Kirana-I". The test was led by CERN-physicist Ishfaq Ahmad, and was witnessed by other senior scientists belonging to Pakistan Armed Forces and the PAEC. To compound matters further, the Soviet Union had withdrawn from Afghanistan and the strategic importance of Pakistan to the United States was gone. Once the full extent of Pakistan's nuclear weapons development was revealed, economic sanctions (see Pressler amendment) were imposed on the country by several other countries, particularly the US. Having been developed under both Bhutto and Zia, the nuclear development programme had fully matured by the late 1980s. Abdul Qadeer Khan, a metallurgical engineer, greatly contributed to the uranium enrichment programme under both governments. A Q Khan established an administrative proliferation network through Dubai to smuggle URENCO nuclear technology to Khan Research Laboratories. He then established Pakistan's gas-centrifuge program based on the URENCO's Zippe-type centrifuge. Khan is considered to be the founder of Pakistan's HEU-based gas-centrifuge uranium enrichment programme, which was originally launched by PAEC in 1974.