to end the 15-month assault to against forces opposed to president bashar al assad. the bbc reports rebel leaders have given the government until tomorrow to observe the u.n. cease-fire plan. if not, opposition forces will no longer be bound by the agreement. and the u.s. ambassador to the u.n. says the security council cannot syria to end the bloodshed. other actions outside the u.n. may be necessary. susan mcginnis in washington with more. good morning to you. >> reporter: good morning. there's new video out by rebel forces that apparently shows new attacks by the government. now, ...