The top U.S. general says the United States may build more military bases in Iraq as part of its escalating campaign against the self-proclaimed Islamic State. The remarks by Chair of the Joint Chiefs of Staff General Martin Dempsey came a day after the White House confirmed plans to deploy up to 450 new U.S. troops to train and back Iraqi forces at a training hub in Anbar province. Dempsey said the Pentagon could establish more sites and deploy even more troops.