Today I Learned (TIL)

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TIL Operation LAC (Large Area Coverage) was a United States Army Chemical Corps operation which dispersed microscopic zinc cadmium sulfide particles over much of the United States and Canada in or... (en.wikipedia.org)

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The original was posted on /r/todayilearned by /u/idkmoiname on 2025-08-02 10:49:08+00:00.

Original Title: TIL Operation LAC (Large Area Coverage) was a United States Army Chemical Corps operation which dispersed microscopic zinc cadmium sulfide particles over much of the United States and Canada in order to test dispersal patterns and the geographic range of chemical or biological weapons

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