MOSCOW, RUSSIA - MARCH 15:  Russian opposition leader and formed Deputy Prime Minister Boris Nemtsov speaks during a rally against the policies and intervention in Ukraine and a possible war in Crimea, on March 15, 2014 in Moscow, Russia. Thousands of Moscouvits gathered for the rally in Central Moscow as Crimeans vote tomorrow on whether to secede and join Russia.  (Photo by Sasha Mordovets/Getty Images)