Operation LAC (Large Area Coverage) was a United States Army Chemical Corps operation which dispersed microscopic zinc cadmium sulfide (ZnCdS) particles over much of the United States and Canada in order to test dispersal patterns and the geographic range of chemical or biological weapons. == 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.
Operation LAC (Large Area Coverage) was a United States Army Chemical Corps operation which dispersed microscopic zinc cadmium sulfide (ZnCdS) particles over much of the United States and Canada in order to test dispersal patterns and the geographic range of chemical or biological weapons. == 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.
Source: Wikipedia "Operation LAC" · CC BY-SA 4.0
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