For the past two decades, Ukraine has been torn between competing impulses. Should it preserve its historical connections with Mother Russia to the East or seek greater economic ties -- and possibly full membership -- with the European Union in the West?
Riot police gather near a barrier set up by Ukrainian supporters of EU integration in central Kiev on Monday. President Viktor Yanukovych is looking for ways to defuse the three-week-old crisis. (Vasily Fedosenko / Reuters)