Pakistan is a nuclear power as well as a declared nuclear-weapon state , having conducted six nuclear tests in response to five nuclear tests of their rival Republic of India in May 1998 . The first five tests were conducted on May 28 and the sixth one on May 30 . With this status , Pakistan is seventh in world , second in South Asia and the only country in the Islamic World . Pakistan also has the sixth-largest standing armed forces in the world and is spending a major amount of its budget on on defense . Pakistan is the founding member of the OIC , the SAARC and the Islamic Military Counter Terrorism Coalition as well as a member of many international organisations including the UN , the Shanghai Cooperation Organisation , the Commonwealth of Nations , the ARF , the Economic Cooperation Organization and many more
sixth one
Chagai-II
History of the Islamic Republic of Pakistan