also used a loop-hole to strengthen its capabilities by purchasing large numbers of two-seater aircraft, which counted as trainer aircraft and were not included in the revisions. These aircraft could have secondary roles. During the Cold War years ( to ), Finland tried to balance its purchases between east, west and domestic producers. This led to a diverse inventory of Soviet, British, Swedish, French and Finnish aircraft. After leading Finnish politicians held unofficial talks with their Swedish counterparts, Sweden began storing surplus Saab 35 Drakens, intended for transfer to Finland in the event of a war against the Soviet Union. This practice continued until the 1980s. On 22 September 1990, a week before the unification of Germany, Finland declared that the limiting treaties were no longer active and that all the provisions of the Paris Peace Treaties were nullified. In the 1990s, with the Cold War over, the Finnish Air Force ended its policy of purchasing Soviet/Russian aircraft and replaced the Saab Draken and MiG-21s in its fighter wing with US F/A-18C/D Hornets. the FAF is organized into three Air Commands, each assigned to one of Finland's three air-defence areas. The main Wing bases are at Rovaniemi, Tampere and Kuopio-Rissala, each with a front-line squadron. Pilot training takes place at the Air Force Academy in Tikkakoski, with advanced conversion performed at squadron level. HX Fighter Program The current Hornet fleet is set to begin being phased out from 2025, and to be completely decommissioned by 2030. The Finnish MoD initiated its Hornet replacement programme in June 2015, and named it the "HX Fighter Program". A working group was created and it identified suitable aircraft. The final decision for choosing the new Air Force jet is based on five key considerations, which are the multi-role fighter's military capability, security of supply, industrial cooperation solutions, procurement and life cycle costs, and security and defence policy implications. An extensive questionnaire had been sent out the producers asking what their products can offer Finland in form of capabilities, cost, security of supply and the domestic industry's role, as well as security and defence policy impacts. The goal is to retain the numerical strength of the FAF fighter fleet, which means that the goal is to obtain some 64 aircraft. The MoD has estimated that the programme will cost somewhere between 7–10 billion Euros. In October 2019, the government of Finland stipulated a budget ceiling