Police officers stand next to a protester during a demonstration in support of activists Maria Alyokhina and Nadezhda Tolokonnikova outside the Russian Embassy in Prague April 15, 2012. The two members of an anti-Kremlin all-girl punk rock band Pussy Riot were ordered detained in prison in March 2012 for mounting a protest "concert" in Moscow's main cathedral, leaping around in brightly coloured masks and brandishing a guitar to recorded music. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: POLITICS CRIME LAW CIVIL UNREST)