Has the 'Arab Spring' Come to the Russian Winter?

Last week, Republican Senator John McCain tweeted to Russia's Prime Minister Putin, "Dear Vlad, the Arab Spring is coming to a neighborhood near you." We hear about Saturday's mass protest and political challenges from the left, the right and even the Orthodox Church. Is Putin really at risk of losing his power? Also, Iraqi Prime Minister Maliki visits the White House. On Reporter's Notebook, is a surprise agreement on climate change just an "empty shell?"

Banner image: An authorized opposition protest against the alleging mass fraud in the December 4 parliamentary polls in central Moscow, on December 10, 2011. Photo by Yuri Kadobnov/AFP/Getty Images