Nine Things to Know About Chemical Weapons

The Pueblo Chemical Depot is set to begin destroying the United States' largest remaining stockpile of chemical weapons this week in southern Colorado. Here are a few things to know about these chemical weapons and how we got here: April 22 marks the 100th anniversary of the first use of chemical weapons in modern warfare at Ypres in Belgium. From World War I to 1968, the United States produced nearly 40,000 tons of chemical weapons. These weapons were either nerve agents or blister agents.

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