As evidenced with the back 50 % of the list, Boeing and Northrop are engaged in anything of the rivalry when it relates to building teaching and prototype fighter planes. Along with the latter obtaining a current agreement for bombers, Boeing could utilize the defense deal for this. The J-20 http://coleyegholm52.jigsy.com/entries/general/An-Unbiased-View-of-american-5th-generation-fighter-jets