Word: graded
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Dates: during 1980-1989
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...Beta Kappa members are students with high grade point averages who are selected to the society for life in their junior or senior years of college--112 seniors were inducted yesterday...
...post-war depression of our grade school years was followed by a roaring boom which lasted until our junior year in high school. About that time, the first feeble attempts at air conditioning--with blocks of ice and fans circulating air--came along. As a Northerner, I often wondered how people in Houston and New Orleans and Mobile survived the summer; even New York could be frightful and Washington was worse. In the fall of 1929 everything collapsed and the United States and the world plunged into economic disaster...
FOOTNOTE: *Uranium 235 (U-235) and plutonium 239 (Pu-239) are the radioactive elements used in atom bombs. Uranium enrichment is the process by which the concentration of U-235 in natural uranium is increased, eventually to weapons-grade material. From 33 to 55 lbs. of U-235 at roughly 93% purity can be used in a Hiroshima-size bomb. Reprocessing is the chemical procedure for extracting Pu-239 from the spent uranium fuel of nuclear reactors, where the plutonium is produced as a waste product. A breeder reactor uses plutonium as fuel rather than uranium: by atomic fission, additional...
...about 345 commercial nuclear power reactors are in operation in 26 countries, and some 52 nations have nuclear research facilities. At least eleven nations possess facilities for the reprocessing of nuclear fuels, all yielding varying amounts of plutonium. Large enrichment facilities to turn uranium into nuclear fuel, or bomb-grade material, exist in the U.S., the Soviet Union, the Netherlands, France and China. Commercial reprocessing plants to extract plutonium from used reactor fuel are located or planned in France, Britain, West Germany, Japan, India and the Soviet Union. Programs involving breeder reactors are under way in the Soviet Union, India...
Khan oversaw construction of a facility at Kahuta that is capable, according to some estimates, of producing more than 30 lbs. of weapons-grade uranium annually. In February 1984, he announced that Pakistan had mastered the uranium-enrichment process, and later boasted that there is "nothing that stands in our way technically to stop us from enriching to 90% weapons-grade uranium." But he has repeatedly stressed that "Pakistan is not at all interested in nuclear weapons." The fact is that Pakistan has built an enrichment plant without an evident use -- except making bombs...