Friedrich Tinner, also known as Fred Tinner or Fred Tinner-Göldi (18 November 1936 – 3 May 2021) was a Swiss people nuclear engineer and a long-associated friend of Abdul Qadeer Khan—Pakistan's former top scientist—and connected with the Khan Labs trafficking in the proliferation of nuclear materials and gas centrifuge designs to Iran, Libya, and North Korea. In 2006, Tinner was revealed by the IAEA's investigators as the foreign director and technical head of the Libyan nuclear program. In Libya, Tinner ran the illicit nuclear experiments, using the expertise and technical information he received from his friend Khan, on behalf of the Libyan nuclear program. According to Khan, Tinner was the former researcher of the Kahuta Research Laboratories during the 1970s, when he worked there as a research scientist under the supervision of A. Q. Khan. Tinner was known and connected in particular with gas centrifuge technology used for isotopic enrichment of uranium.
However, Khan maintained that Khan first met with Tinner in 1976 when Khan and Tinner were placing sensitive projects for the Vakuum-Apparate-Technik ( VAT) (English: Vacuum Apparatus Technology). A competent nuclear engineer, Tinner left VAT and traveled to Pakistan quite often as he was employed at Khan's Engineering Research Laboratories (ERL). Tinner resided with Khan and his family where, at ERL, Tinner performed experiments under Khan's supervision. However, in the 1980s, Tinner was invited by Colonel Muammar Gaddafi to join and head the Libyan nuclear program. Throughout the 1980s, Tinner tried to maintain the Libyan nuclear program and performed illicit and illegal experiments. However, Tinner again left for Pakistan and the program was dismantled. In 1995, Tinner again returned to Libya with the documentation provided by Khan. Following his return, Tinner became technical directorate officer of Libyan nuclear program, using Khan's expertise to develop the centrifuges. However, due to Libya's academic progress and lack of technicians, the program could not prevail and suffered many setbacks. In 2000, Khan provided sensitive centrifuge designs to Tinner on gas-centrifuge method. But due to its complexity and difficulty, Tinner was unable to establish the gas-cetrifuge program for Libyan nuclear program, therefore, Colonel Gaddafi dismantled and rolled back the program. In 2004, Libya dismantled its program and provided its technical and nuclear materials to IAEA and the United States. Libyan revelations also led the arrest of its former head of the program, Friederich Tinner. In Pakistan, Abdul Qadeer Khan was debriefed by the Pakistan Armed Forces which continued until next 4 years.
In May, the President of the Swiss Confederation, Pascal Couchepin, announced that the Tinner files, believed to number around 30,000 documents, had been shredded. This was justified to avoid them, "getting into the hands of a terrorist organisation or an unauthorised state", according to Couchepin. However it is alleged that this was a cover-up, to hide the involvement of Urs Tinner with the CIA. Although the Swiss government claimed that the shredding was a security requirement of the IAEA as a measure against nuclear proliferation, it is widely alleged that this was done solely under American pressure, either to hide their involvement or to avoid damage to their own propaganda. Swiss senator Dick Marty has questioned the need for their destruction, pointing out that they could merely have been held secret.
In 2012, all three were released from jail. Marco was sentenced to 41 months in prison, Urs 50 months and their father was given a 24-month suspended sentence. They were released immediately on the basis of time already served.
Tinner died on 3 May 2021, at the age of 84.
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