KIEV, UKRAINE - FEBRUARY 22: People, some bearing Ukrainian flags, attend ceremonies marking the first anniversary of the Maidan revolution that led to the ouster of Ukrainian President Viktor Yanukovich one year ago at Maidan Independence Square on February 22, 2015 in Kiev, Ukraine. Tens of thousands as well as several European heads of state attended the event. Meanwhile Ukrainian government forces and pro-Russian separatists have exchanged prisoners in a promising sign that the recent Minsk ceasefire agreements might still have a chance. (Photo by Sean Gallup/Getty Images)
