The Salisbury Poisoning refers to the incident that occurred in March 2018 when former Russian spy Sergei Skripal and his daughter Yulia were poisoned in the city of Salisbury, England. They were exposed to a nerve agent called Novichok, which is a highly toxic substance developed in the Soviet Union. The attack led to a major international crisis and raised concerns about the use of chemical weapons. Following the poisoning, a large-scale investigation was launched by British authorities, and several countries expressed solidarity with the UK. The incident resulted in diplomatic tensions between the United Kingdom and Russia, with the UK accusing Russia of being behind the attack. The event highlighted issues of espionage, national security, and the dangers of chemical warfare.