ut ▁to ▁the ▁top ▁of ▁the ▁root ▁to ▁upper ▁wing ▁inner ▁str ut , ▁to ▁further ▁improve ▁t ors ional ▁strength . ▁ ▁At ▁the ▁rear , ▁the ▁little ▁fin ▁was ▁remove ▁and ▁the ▁rud der , ▁still ▁bal anced , ▁res h aped . ▁ ▁Two ▁more ▁aircraft ▁with ▁these ▁modifications ▁were ▁built . ▁ ▁Despite ▁F ok ker ' s ▁efforts , ▁the ▁aircraft ▁was ▁still ▁not ▁to ▁the ▁lik ing ▁of ▁the ▁USA AS ▁who ▁did ▁not ▁buy ▁any ▁of ▁the ▁three ▁D . X II s ; ▁further ▁development ▁was ▁abandoned . ▁ ▁Spec ifications ▁( C urt iss ▁D - 1 2 ▁engine ) ▁ ▁References ▁ ▁D . X II ▁Category : 1 9 2 0 s ▁Dutch ▁f ighter ▁aircraft ▁Category : Bi plan es <0x0A> </s> ▁Gian ni ▁Ri otta ▁( born ▁ 1 9 5 4 ▁in ▁Pal ermo , ▁Italy ) ▁is ▁an ▁Italian ▁journalist , ▁a ▁regular ▁contrib utor ▁for ▁the ▁daily ▁newspaper ▁La ▁St ampa ▁and ▁a ▁former ▁Editor ▁in ▁chief ▁of ▁the ▁financial ▁newspaper ▁Il ▁So le ▁ 2 4 ▁O re , ▁ ▁R ai ▁ 3 ▁and ▁the ▁news ▁bullet in ▁T G 1 . ▁ ▁He ▁has ▁contributed ▁to ▁the ▁Washington ▁Post , ▁Le ▁Monde , ▁Foreign ▁Policy , ▁and ▁the ▁New ▁York ▁Times . ▁ ▁Ri otta ▁s its ▁on ▁the ▁Ad vis ory ▁Council ▁of ▁the ▁Department ▁of ▁French ▁and ▁Italian ▁at ▁Pr inc eton ▁University . ▁He ▁also ▁collabor ates ▁with ▁I MT ▁School