SORU: boş bırakılan yere parçanın anlam bütünlüğünü sağlamak için getirilebilecek cümleyi bulunuz
In 1992, the United States declared that it would no longer carry out nuclear weapons tests. ----. The reality was rather different, however, for by the early 1990s, the power of supercomputers had reached such a point that for the first time, weapons could be designed, tested and maintained in secrecy.