Marina Litvinenko does not believe that Russian president Vladimir Putin will extradite the man named by prosecutors as the main suspect in the death of her husband.
Andrei Lugovoy, now a politician in Russia, was named by prosecutors as the main suspect in the case, but Marina Litvinenko said she thought it was unlikely that he would change his mind and extradite him.
Speaking to reporters she said: "I believe Putin will not change his decision to extradite or change his decision."
She added: "What I do is not against Russia because I am Russian and I love my country."
More top news
Shira Banki, 16, died on Sunday of stab wounds sustained when an ultra-Orthodox Jew attacked a Gay Pride parade in Jerusalem.
HSBC has reported a 10% rise in profits for the first half of the year - boosted by bumper profits in Hong Kong.
Barnado's has received £3 million to tackle child sex abuse in Rotherham, nearly a year after the Jay Report was released.