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Operation LAC (Large Area Coverage), was a U.S. Army Chemical Corps operation which dispersed microscopic zinc cadmium sulfide (ZnCdS) particles over much of the United States. The purpose was to determine the dispersion and geographic range of biological or chemical agents. ==Earlier tests== There were several tests that occurred prior to the first spraying affiliated with Operation LAC that proved the concept of large area coverage. Canadian historical files relating to participation in the tests cite in particular three previous series of tests leading up to those to conducted in Operation LAC.〔http://data2.archives.ca/e/e443/e011063033.pdf Department of National Defence (Canada), Biological Warfare〕 * September 1950-Six simulated attacks were conducted upon the San Francisco Bay Area. It was concluded that it was feasible to attack a seaport city with biological aerosol agents from a ship offshore. * March- April 1952-Five trials were conducted off coast of South Carolina and Georgia under Operation Dew. It was concluded that long range aerosol clouds could obtain hundreds of miles of travel and large area coverage when disseminated from ground level under certain meteorological conditions. * 1957-North Sea, East coast of Britain. it was shown that large area coverage with particles was feasible under most meteorological conditions. In addition, army admitted to spraying in Minnesota locations from 1953 into the mid-1960s.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Operation LAC」の詳細全文を読む スポンサード リンク
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