South Korean Defense Minister Kim Kwan-jin says North Korea has likely had enough time to develop miniature or lightweight nuclear arms since conducting nuclear tests in 2006 and 2009.Standing in front of lawmakers on Monday, Kim added that the chances of the North succeeding in such developments are high, but that he didn't have definitive evidence or intelligence to back up this assumption.Meanwhile, the defense chief verified a recent report by the Associated Press that the North was near completing construction of its second long-range missile launch site and that it is bigger and more elaborate than its first.When asked about the South's military's offensive prowess, Kim said although there may be some limitations, it would be still able to rightfully defend the country and that it could also detect movements in the North to install nuclear warheads.