The U.N. Security Council monitors Yemen 's embattled situation . U.N. envoy says Syria is in a ` ` rapid downward spiral , '' ongoing unrest . Houthi rebels have crossed over the Taiz canal and set up checkpoints nearby .
The U.N. Security Council backs Yemen 's embattled President . U.N. envoy says Yemen is in a `` rapid downward spiral , '' urges dialogue . Houthi rebels have taken over the Taiz airport and set up checkpoints nearby .