[JURIST] Hundreds of Russian rights activists allied with both liberal and communist groups rallied in Moscow Sunday to mark the country's Constitution Day and protest what they see as an undemocratic and dangerous centralization of power by the Kremlin. Not coincidentally, Sunday was also marked by President Vladimir Putin's signing of a bill that would make regional governor's subject to central appointment rather than direct election in the regions. See an Itar-Tass report here. AP has more. Ironically, this could be the last time Russian celebrate Constitution Day.