Immediately after the 1989 Velvet Revolution, the president of Czechoslovakia Václav Havel declared a demobilisation of the Czechoslovak defence industry. Nevertheless, after the dissolution of the Soviet Union in 1991, the Czech company Aero Vodochody continued developing the basic L-39 Albatros design with a view toward greater export. The resulting L-39MS, later designed as L-59 Super Albatros, featured a more powerful turbofan engine, advanced avionics, and has been bought in quantity by Egypt and Tunisia. In 1993 a group of Czech military experts launched a project of production of a modern domestic fighter to replace the obsolete Soviet aircraft. Since the proposed Aero L-X supersonic fighter development proved to be financially demanding (up to US$2 billion), the less costly L-159 subsonic attack aircraft was approved for procurement instead.