Pollution by depleted uranium from armor piercing shells. But both sides are permitted to continue modernization plans, and the number of nuclear warheads carried on some categories of strategic weapons is projected to actually increase by the late 1990s under the treaty. Unilateral cut of tactical nuclear weapons by President G.Bush. Soviet Union President Mikhail Gorbachev, responded with a plan of similar reduction of nuclear weapon number. Soviet Union breaks up into independent states.
Cold war ends.
Indefinite postponement of production of nuclear warheads for Trident II, W-88, by President G. Bush. Bilateral agreement between the US and Russia which if ratified, would cut one-half of strategic nuclear weapons. Manufacturing and dismantling of 6 nuclear bombs confirmed since 1989. Nuclear warhead accident causes rapid increase in radioactivity in Pervomaisk arsenal. Due to too densely storing of nuclear warheads.