Sergei Skripal, a former Russian intelligence officer who spied on behalf of Britain, and his daughter, Yulia, were just two of those affected by the nerve gas attack in Salisbury, England, in March 2018. 40 people got sick, three police officers were taken to hospital, one of which had to be treated for more than two weeks. Chemical combat experts wearing protective clothing have carefully examined the location of the Skripals in recent years to find a clue about what has happenned and to see if they are still under threat...