My strong Sacha, known to the world as Alexander Litvinenko – the unyielding thorn ... dose of radioactive polonium slipped into Sacha's tea by a Kremlin assassination squad.

In 2006, Russian defector Alexander Litvinenko, a former agent for the KGB and its post-Soviet successor agency, the FSB, became violently ill in London after drinking tea laced with radioactive ...

And it was about a Russian dissident called, Alexander Litvinenko, who was famously murdered in 2006 with a radioactive cup of tea, poured by two assassins sent by the Kremlin to kill him.

Former Russian spy Alexander Litvinenko died in a London hospital in 2006, after drinking tea poisoned with the highly radioactive material - polonium. But who wanted him dead, and why?