U.S. Defense Secretary Ash Carter described airstrikes launched without warning as unprofessional. Tune into World News Tonight with David Muir weeknights .\r<br>\r<br>Subscribe: U.S. Secretary of State John Kerry says Washington is concerned over reports Russia is hitting non-IS targets in .\r<br>\r<br>U.S. Defense Secretary Ash Carter described airstrikes launched without warning as unprofessional. Subscribe: U.S. Secretary of State John Kerry says .\r<br>\r<br>NATO has expressed concern over Russias airstrikes on Syria, saying the raids might have targeted Western-backed militants. NATO Secretary General Jens .
