In 1995, Gaddafi renewed calls for nuclear weapons and pursued new avenues for nuclear technology procurement, while publicizing the NPT. In 1997, Libya received technical documentation and materials on gas centrifuges from various sources, as Libya had made a strategic decision to start the program with a new attitude. Libya employed a large number of black market network, first reeving the 20 pre-assembled centrifuges and components for an additional 200 centrifuges and related parts from foreign suppliers. The pre-assembled rotors for centrifuges were used to install a completed single centrifuge at the Al Hashan site, which was first successfully tested in October 2000.