U.S., Russia fail to agree on how to revive Syria ceasefire

The United States and Russia failed to agree on how to revive a ceasefire in Syria on Thursday as U.S. Secretary of State John Kerry said Washington cannot be the only one trying to hold open the door to peace and urged Russia and the Syrian government to do their part. "If the Russians come back to us with constructive proposals we will listen," Kerry said after a meeting of the International Syria Support Group on the sidelines of the annual U.N. gathering of world leaders.