Vilnius

A pedestrian walks along the banks of the Neris river as temperatures dipped to -18 degrees Celsius (-0,40 degrees Fahrenheit) in Vilnius, Lithuania, Monday, Jan. 20, 2014.

Mindaugas Kulbis/AP

A pedestrian walks along the banks of the Neris river as temperatures dipped to minus 18 degrees centigrade in Vilnius, Lithuania, on Monday.

Ukrainian President Viktor Yanukovych, center, poses with other EU heads of state and Eastern Partners during a group photo at an Eastern Partnership Summit in Vilnius on Friday, Nov. 29, 2013. The European Union is extending its geopolitical reach eastward by sealing association agreements with Georgia and Moldova, but has missed out on a landmark deal with Ukraine as its key objective.

Mindaugas Kulbis/AP

Ukrainian President Viktor Yanukovych, center, poses with other EU heads of state and Eastern Partners during a group photo at an Eastern Partnership Summit in Vilnius.