Chemical weapons expert: 'Russia will have a lot to answer for'
The use of a Novichok nerve agent is a significant development, chemical weapons expert Dr Richard Guthrie tells the BBC.
"The Russians will have a lot to answer for," he said.
The use of a Novichok nerve agent is a significant development, chemical weapons expert Dr Richard Guthrie tells the BBC.
"The Russians will have a lot to answer for," he said.