United Kingdom's U.N. Ambassador Mark Lyall Grant, left, arrives for a news conference after a private U.N. Security Council meeting on the Ukraine, Friday, Feb. 28, 2014, at United Nation headquarters. (AP Photo/Bebeto Matthews)
Samantha Power, U.S. Ambassador to the U.N., speaks during a news conference after a private U.N. Security Council meeting on the Ukraine, Friday, Feb. 28, 2014, at United Nation headquarters. (AP Photo/Bebeto Matthews)
Russia's U.N. Ambassador Vitaly Churkin, center, listens during a news conference after a private U.N. Security Council meeting on the Ukraine, Friday, Feb. 28, 2014, at United Nation headquarters. (AP Photo/Bebeto Matthews)