The Saab JA 37 Viggen is an indigenous Swedish fighter jet used in a variety of roles. With only Sweden using this aircraft, join Chris as he explains the ins-and-outs of this powerhouse. Finally jump into the cockpit to have an exclusive look at the inner life of Viggen. This JA 37 Di Viggen was also used as a test bed for systems installed into JAS 39 Gripen.