U.S. Secretary of State John Kerry is vowing to make the agreement to seek a temporary truce in Syria work after Russia's foreign minister sounded a skeptical note on chances of securing a halt in fighting within a week.
Russia's Sergey Lavrov put the probability of securing "cessation of hostilities" in Syria within the week, as planned by international diplomats, at only 49 percent during an appearance at the Munich Security Conference.
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