Armenia protests: the PM and his opposition nemesis

Anti-government protests have gripped Armenia for more than a week in protest at a constitutional change that has allowed the country's former president to retain power as prime minister.Serzh Sarkisian took up the new position after stepping down from the presidency after serving two five-year terms.Opposition MP Nikol Pashinyan, who has been leading the protests, has insisted that Sarkisian should resign as PM.