71.  The treaty allows nuclear states to keep their weapons while restricting others from developing them.

72.  The U.S. team arrived in Pakistan from neighboring India, which also declared itself a nuclear state after conducting underground nuclear tests last May.

73.  These questions are asked because nuclear states are the most vocal and vehement opponents of nuclear proliferation.

74.  Those advocating a limited extension want the nuclear states to do more to ban nuclear tests, dismantle arsenals and give weaker nations guarantees against atomic attack.

75.  Two of the other nuclear states had many colonies which were abandoned with various boundary, tribal and other problems.

76.  U.N. official urges nuclear states to stop making weapons material.

77.  While calling on India and Pakistan to cease nuclear testing, the initiative also seeks action from established nuclear states to dispose of their weapons.

78.  While the five acknowledged nuclear states have announced plans to halt production of plutonium and uranium for weapons, the study said Israel and India have not.

79.  Germany meanwhile called on the four nuclear states of the former Soviet Union -- Russia, Ukraine, Kazakhstan and Belarus -- to tighten their controls on nuclear ingredients.

80.  India and Pakistan are considered threshold nuclear states.