The family of Tech Sgt. Tyler Simmons, 28"one of six American service members killed Thursday when an Air Force refueling aircraft crashed while supporting military operations in Iran"said they believe his death could have been prevented. "Just the worst nightmare we could ever imagine. We trust in God that he will comfort us and be with our family," Simmons' cousin, Stephan Douglas, told NBC4 in Simmons' native Ohio. "We believe this could have been prevented. It's a sad day." Douglas added that "We didn't need to be in this war." "This is uncalled for, and this is what we get," he said. Simmons' grandmother, Bernice Smith, echoed the same sentiment to NBC4. "Families are suffering right now," she said. "Just to create a war because you want to create a war is not right."