TOP SECRET To this end they have devoted themselves to the production of large numbers of electronic equipments for their air warning system and to the organisation of this system so as to make the most effective and yet economical use of their resources. 5. The development and production of fighter aircraft has progressed on similar lines as has also the operational coordination of these aircraft with the remainder of the active air defence forces. Moreover, the Russians, have extended this co-ordination to the Satellite and Occupied countries where the air warning and fighter elements appear to have been integrated with their counterparts in the Soviet air defence organisation.