Could we first take a look at something that can prove any of the accusations?

Alex, Boston, US

Alexander Litvinenko's life was placed in endangerment through his collaboration with Mario Scaramella to ferret out FSB KGB assets and undercover agents operating in Italy on behalf of the Mitrokhin Commission and when he collaborated with Yuri Shvets who entrusted to him incriminating dossiers on Russian businesses involved with crime families, corrupt officials alleged to have ties to the FSB and the powerful siloviki surrounding Putin. In Italy Litvinenko, acting on information allegedly from the FSB, falsely accused a former FSB agent of being engaged in an assassination plot against two members of the Mitrokhin Commission, a crime Scaramella was later convicted of planting false evidence The Yukos Oil dossier prepared by Shvets, entrusted to Litvinenko, who allegedly entrusted a copy to Lugovoi, was said to have triggered the state sponsored assassination of Litvinenko. The verdict on the evidence related to Litvinenko's involvements with Scaramella and Shvets remains open.

Brian K. Doan, Alexandria, VA USA

Well, Russian misanthropic thugs call Litvinenko traitor who betrayed his oath and fidelity to motherland. In other words, they attest they were behind his murder and FSB (KGB) was involved in this act of state-sponsored terrorism. What a shame for Rossia!

SERHIY, Lviv, Ukraine

Britain, like France and Germany, cowers like frightened child whenever they are compelled to face Russia. The Kremlin is filled to the brim with criminals, gangsters, and cutthroats- a mob of brigands has terrorized all Europe, whom they hold at the point of a gas pipe. Bloodfeuds playing out in Mayfair, Oligarchs buying up Chelsea and Knightsbridge, Russian bombers overflying British airspace- and how does No. 10 react? Slash the Royal Navy to such an extent that they couldn't patrol a child's bathtub! When the British finally get an opportunity to stand up to Putin's thugs, they choke, launching a cursory investigation. Demand all suspects be extradited, or force Russia to face trade sanctions and a NATO Censure! No, the British people themselves are to blame. Since 1918, they've fallen from pride, into self-loathing and despair. They no longer have the will to combat agression abroad, or to act to save their own skins. Europe needs a Trajan, an Alexander, a Napoleon.

JC, MI, United States

Dieter, Rotterdam, Netherlands

Thank God, that there are such logical and soberminded people in the West, as you!

Alexey, Moscow, Russian Federation

Oh, come on! It is easy to see what happened to Litvinenko if you ask his wife where did they get money to live in UK! He did not have a proper job! But he bought a house in London! He said Berezovski gave him the money to buy the house. What did Litvinenko give him in exchange? Or how did he manage to return this money? Obviously he was involved in smuggling of radiactive materials - that is the only explanation of how he managed to support himself and his family without having a job!

Alex, Moscow,

I don’t know how many Russians have read that book, but documentary movie based on the book was demonstrated by central Russian TV channels. The FSB conspiracy theory by Litvinenko has no any rational, since everyone in Russia, in contrast to you, knows that second Chechen war started following the invasion of Chechen forces to Dagestan (august 1999) before the attacks on apartments (September 4, 9 and 13, 1999). Litvinenko also knew that but dancing to Berezovsky’s pipe told this entire fib in his book.

Alex, Rochester, USA

I’d just like to clarify some points to the non-Russian readers. You may be shocked by the spine-chilling callousness of the majority of the postings by Russians. Here we are, commenting on a ‘plea’ of a widow who has lived through such a harrowing experience that is unimaginable for the rest of us. But instead of sympathy and support, these people use the article as an opportunity to smear, malign, distract attention and in general muddy the waters. It looks like a pack of curs happy to show their loyalty to the master are nibbling at the wounded bleeding lion.
But you should not be deceived – these are the people who are hired by the Kremlin-KGB mafia to look through all the Western media publications and post their comments.
And 2 more very important points:
Litvinenko had NEVER BEEN A SPY.
Polonium was chosen because it is (was until this case) ABSOLUTELY UNDETECTABLE: the probability of it being detected was believed to be ‘nil’, for several reasons... sorry 0 characters left

Victoria, Moscow, Russia

I wonder how many of the Russian contributors here have actually read the book Litvinenko wrote called "Blowing up Russia"? It is a closely argued and compelling account of exactly how why and where the FSB had every motive for organising those attacks on the apartment blocks and if Litvineko was not right about that, and the Kremlim cares so little about him, why then did Russia (1) ban the sale of the book there? and (2) pass a law in the Russian Parliament authorising the liquidation of people like him whether at home or abroad, who propogate anti State dissenting views?

I think the Kremlim not only was behind his assassination they made sure they acted within their own laws in doing so! Hardly could there have been a more telegraphed State assassination in history? Litvinenko was of course well aware he was a target, but still that didnt save him. I only pray Marina wll be luckier.

Alastair, Rye, East Sussex

These Oligarj types seem to be dropping like flies..

Why did Litvinenko carry on his Russian crusade after he became British? As a Brit he should have started a new life. and not endangered his adopted country's citizens and businesses by carrying on his old battles. It is like the Mafia changing their turf. He lived as he died.

This is not a matter for British tax payers. Mrs. L can get one of the surviving Oligarch's to fund her feud.

Kara Swart, London, UK