<Li> 25 April: North Korea says it has reactivated its nuclear facilities . </Li> <Li> 25 May: North Korea tests its second nuclear device . </Li> <Ul> <Li> April: North Korea prepares to test its third nuclear device . </Li> <Li> 13 April: North Korea's launch of its Kwangmyŏngsŏng - 3 satellite which fails shortly after launch . It is intended to mark the centenary of Kim Il Sung's 100th birthday and the satellite will estimate crop yields and collect weather data as well as assess the country's forest coverage and natural resources . </Li> <Li> 12 December: North Korea's launch of its Kwangmyŏngsŏng - 3 Unit 2 satellite that is meant to replace the failed Kwangmyŏngsŏng - 3 satellite, and became the 10th space power that is capable of putting satellites in orbit using its own launch vehicles . The launch came during the period when the DPRK was commemorating the first anniversary of the death of former leader Kim Jong - il and just before the first South Korean domestic launch of a satellite and the South Korean presidential election on 19 December 2012 . </Li> </Ul> <Li> April: North Korea prepares to test its third nuclear device . </Li>

When did north korea first get nuclear weapons