Back to 1967, when several nations of NATO proposed to next generation combat aircraft for replacement of F-104 and G.91Y. The SAAB Viggen does on the deck to be alternative. I checked the specification of Viggen and other plans to both, then the question raised, why they didn't choose Viggen, since to be interceptor, the Tornado seem to be not better than Viggen, whereas most of nations in that Group need a multi-function fighter rather than a bomber as Tornado factually.