experience of vladimir putin's government targeting its perceived enemies in two thousand and six the former russian agent alexander litvinenko was fatally poisoned using radioactive polonium in london british courts firmly established that the attack was carried out by russia an inquiry concluded that vladimir putin probably approved the killing of his wife marina that the negro has campaigned tirelessly ever since then to preserve alexander litvinenko as memory and to bring to justice those who killed him mrs that joins me tonight from london good evening to you mrs the litvinenko we appreciate you taking the time to be on the day there have been four reported exposures to novi choke in the u.k. this year one person has died there's a murder investigation now underway based on what you experienced following your husband's murder is the british government handling the no bid showcases