In this file photo taken on on Oct. 4, 1987, a Soviet army officer presents ammunition rigged with chemical agents during a visit by Western diplomats and journalists to a chemical weapons research facility in Shikhany, Saratov region, Russia. The facility in Shikhany led the efforts to develop Soviet chemical weapons, including Novichok-class nerve agents.
John Thor Dahlburg/ AP Photo
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.
Murder? Dawn Sturgess, 44, died after being exposed to the nerve agent Novichok.
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.
A police officer stands next to a rubbish bin that has been cordoned off in Salisbury, Britain, 05 July 2018.
Former Russian spies Alexander Litvinenko and Sergei Skripal were both poisoned – one polonium, the other by Novichok. Now that there's been another nerve agent case, what's the difference?
Emergency personnel at the Ashley Wood Recovery Centre in Salisbury as the investigation into the suspected nerve agent attack on Russian double agent Sergei Skripal continues.
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.
Police teams bag up swabs from railings outside The Maltings shopping centre, where former Russian double agent Sergei Skripal and his daughter Yulia were found critically ill.
A long read on how nerve agents were developed – and used in an attack on a former Russian spy on the streets of Salisbury.
Skripal attack: military investigators tread carefully.
Andrew Matthews/PA Wire
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.
Investigations continue into the nerve agent attack on Sergei Skripal and his daughter.
Andrew Matthews/PA Wire
The UK is pointing the finger at Russia for the nerve agent attack on a former spy. How should the government react?
Military working in the area where the poisoning took place wear protective clothing to reduce risk to their own health.
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.
Enzymes, the catalysts of biology, can engulf and break down hundreds of nerve agent molecules per second.
Image: Pymol. PDB 4E3T rcsb.org
Scientists invented chemical weapons; some are now working to destroy them. New biomolecular design techniques let researchers design proteins that can destroy nerve agents in bodies.
Little protection against the deadly VX nerve agent.
Malaysian police have identified a chemical the could have led to the death of the North Korean leader's half brother as the deadly VX nerve agent.
UN inspectors will face several problems determining what has happened in Damascus.
It’s been a little more than a week since reports surfaced of a large-scale chemical weapon attack in Syria. Governments in Europe and the United States have accused the Syrian government of attacking…
Hopefully this will remain a rare sight.
There was chaos on the streets of Halajba in March 1988. In this corner of Iraq, at the time Iraqi Kurdistan, people had suddenly started experiencing cold-like symptoms – tight chest and nasal congestion…