This photo taken on Monday, May 26, 2014 and provided by Dalton Barlow, shows a tornado heading towards Watford City, N.D. A National Weather Service team is headed to western North Dakota Tuesday, to assess the strength of the tornado that injured at least nine people, including a 15-year-old girl who suffered critical injuries, and damaged or destroyed 15 trailers at a workers' camp in the heart of the state's booming oil patch. (AP Photo/Dalton Barlow) MANDATORY CREDIT