(The Drive) - In an unusual move, late last year, Russian authorities sent a letter directly to American lawmakers complaining that the United States needs to prove that it is not in violation of a key arms control treaty. The same document includes “clarifications” and other rejections of the U.S. government’s own concerns about Russian developments. But those latter statements strongly suggest that the Kremlin may have initiated development of a number of new nuclear weapons specifically to skirt the agreement’s requirements or perhaps give the country additional leverage in future negotiations.