Syrian President Bashar al-Assad. Photo: Mikhail Klimentyev/Tass/PA Images

Last week, the United States, French and UK governments justified their limited attacks on Syria’s chemical weapons facilities on the grounds that the Assad regime had breached an internationally accepted barrier—he had used chemical weapons.

Efforts have been made to outlaw chemical weapons for over a century, starting with the 1925 Geneva Protocol and culminating in the 1993 Chemical Weapons Convention, which came into force in 1997 when the Organisation for the Prohibition of Chemical Weapons (OPCW) was established. Today, 192 states or parties are signatories: every country except South Sudan, North Korea and Egypt. Israel has signed but not ratified it.

The Syrian government acceded to the convention in 2013, as part of the deal negotiated by Russia to prevent military strikes, after chemical weapons were first used in Syria. Russia guaranteed the removal of all Syria’s chemical weapons and in June 2014, the joint UN-OPCW mission to Syria announced that the task of removing declared chemical weapons was complete. Mission accomplished.

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