 
			     
   Secure Scanned : 10/27/2025
				     Secure Scanned : 10/27/2025
                    
                    
                 
							NOVA 1990 -
Overview:Sixty-five years after attempts to ban them, chemical weapons pose more of a threat than ever. NOVA looks at the problem of controlling substances that are easily produced and cruelly effective.





 
								
								
							
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