Some of the major events in US-Iran relations highlight the differences between the nations' views, but others presented real opportunities for reconciliation.
For decades, international law did not allow one country to attack another that was using chemical weapons on its own people without UN approval. That’s changed, which means trouble for Syria.
The use of chemical weapons has shifted from the battlefield to attacks on civilian targets. Time to rethink the convention that prohibits their use.
Novichok are a set of molecules that are some of the most deadly nerve agents ever developed. They are almost impossible to detect and clean up.
The same deadly nerve agent used against a former Russian spy and his daughter could be linked to a second poisoning that killed a 44 year old woman in the UK.
The spectacle of thousands of soldiers gassed to death in France announced to the world that a new class of weapons had arrived.
A decades-long policy of ambiguity means that Israel's chemical arsenal remains the subject of speculation.
Donald Trump, Emmanuel Macron and Theresa May all have something to prove at home by bombing Syria.
Are air strikes really a way to hold the Syrian regime responsible for its alleged atrocities against humanity? History says no.
The United Nations Charter doesn't allow the use of military force to prevent chemical weapons attacks — no matter how evil — without UN Security Council approval. That needs to change.
Nothing the world has done has stopped Bashar al-Assad's regime from using chemical weapons – but it's imperative to keep trying.
An audio version of an in depth article on the story of how the nerve agent used in an attack on former Russian spy Sergei Skripal was developed.
International law on chemical weapons fails without mutual trust and transparency.
Hundreds of people have been warned after former Russian spy Sergei Skripal was poisoned with Novichok nerve agent.
Even if they do eventually wake up, Sergei and Julia Skripal could suffer permanent damage as a result of their exposure to a Novichok nerve agent.
Russia isn't the only suspect when it comes to the practice known as 'wetwork'.
Nerve agents were discovered by accident in the 1930s.
Denial and obfuscation have always been a part of chemical warfare.
Donald Trump's predecessor once made an empty threat against Bashar al-Assad – and it didn't end well.
Relations between Russia and the United States have reached an all-time low since the US strike on Syria. But Moscow knows that Washington will need its support if tension rises with North Korea.