abuja unite state formally agree sell 12 super tucano a-29 plan weapons nigeria west african country air force say confirm resurrection deal freeze obama administration right concern former u.s. president barack obama delay sale one last decisions office nigerian air force bomb refugee camp january successor donald trump decide press transaction support nigeria efforts fight boko haram militants boost u.s. defense job source tell reuters april u.s. ambassador nigeria present letter offer acceptance nigeria air force early wednesday air force say statement say u.s. state department approve sale final agreements would sign necessary payments make feb. 20. immediate statement u.s. embassy authorities washington u.s. government nigerian air force officials would meet early january discuss early delivery aircraft payment make nigerian air force say sale 12 aircraft weapons service worth 593 million include thousands bomb rocket propeller-driven plane reconnaissance surveillance attack capabilities make brazil embraer second production line florida partnership embraer privately hold sierra nevada corp spark nevada super tucano cost 10 million price go much high depend configuration power pratt whitney canada pt engine nigeria say u.s. agree delay 593 million fighter plane sale