If, on occasion, the knowledge brought by science leads to an unhappy end, this is not to the discredit of science but is rather an indication of an imperfect ability to use wisely the gifts placed within our hands. ↗
Since the end of the Cold War two main nuclear powers have begun to make big reductions in their nuclear arsenals. Each of them is dismantling about 2,000 nuclear warheads a year. ↗
When the START 2 treaty has been implemented - and remember it has not yet been ratified - we will be left with some 15,000 nuclear warheads, active and in reserve. Fifteen thousand weapons with an average yield of 20 Hiroshima bombs. ↗