(Reuters) — The Russian state must have been involved in the 2006 poisoning of ex-KGB agent Alexander Litvinenko with a radioactive isotope, which amounted to “a nuclear attack on the streets” of London, an inquiry into the death was told on Thursday (July 30). Kremlin critic Litvinenko died weeks after drinking green tea laced with polonium-210 at London’s plush Millennium hotel. From his deathbed he accused Russian President Vladimir Putin of ordering his killing but […]