2015/02/18 Headlines: Obama Delays Immigration Orders as it Appeals Judge's Order; Immigrant Rights Protesters Denounce Court Ruling Blocking Reprieves; U.N.: Assad Regime Agrees to Halt Bombing of Aleppo; Report: U.S. Coordinates Strikes with Syrian Rebels; Ukrainian Forces Pull Back from Besieged Town After Heavy Casualties; U.S. Accuses Russia of Violating Ceasefire; U.N. Security Council Calls for End to Violence; U.N. Security Council to Meet on Libya as Egypt Calls for Global Intervention; Greece to Seek Six-Month Loan Extension as Austerity Standoff Grows; U.S. Will Let Foreign Allies Purchase Armed Drones; Ashton Carter Sworn In as Pentagon Chief Following Senate Confirmation