A Soviet whistle-blower told the world about the nerve agent Novichok nearly 30 years ago. Since then, it has mystified American weapon's experts and the Pentagon sent teams to destroy labs where the chemical was created and produced.
While the nerve agent was known about, there was never any intelligence that it had ever been used...until last week in Salisbury.
Novichok was released in the small town of Salisbury and infected a former Russian spy, Sergei V. Skripal and his daughter Yulia on March 4th. The two remain hospitalized in critical condition.
Read the full history and saga at the NY Times