Pakistan retaliatesPakistan conducted five nuclear tests, its first ever.
On May 28 1998, Pakistan announced it had successfully held five nuclear tests.
He added: "When the Non-Proliferation Treaty was signed there were five nuclear weapons states.
South Korea announced Monday that it found five nuclear reactors running with falsely certified components.
EDF said that it intended to build up to five nuclear reactors in Britain.
You say all five nuclear weapons states — the U.S., Russia, France, Britain and China — have stopped producing fissile material.
North Korea has enough plutonium in Yongbyon to rapidly make at least five nuclear weapons, possibly more.
There are five nuclear armed bases in non-nuclear countries: Belgium, Germany, Italy, the Netherlands and Turkey.
It produces enough weapons-grade plutonium for five nuclear warheads every year, according to the Federation of American Scientists.
Not quite two years ago it showed its prowess and startled everyone by carrying out five nuclear tests.
Five nuclear workers have reportedly died since the quake and tsunami hit on Friday, knocking out diesel-fuelled cooling systems.
