Greenpeace activists, members of the 'Arctic 30,' (L-R) Iain Rogers from United Kingdom, Gizem Akhan from Turkey and Anne Mie Roer Jensen from Denmark, hold their passports with a Russian transit visa outside of the offices of the Federal Migration Service Department in St. Petersburg, on December 26, 2013. Last week Russian lawmakers approved a Kremlin-backed amnesty bill ending the prosecution of the so called Arctic 30. - 

After being held in Russia for 100 days on charges of hooliganism, 30 Greenpeace activists are free to return to their home countries today. The group had been protesting oil drilling in the Arctic by state owned oil and gas company Gazprom. The BBC's Oleg Boldyrev has the latest on the story. Click the audio player above to hear more.