去年，有官员表示，胡克先生的团队所得出的结论是针对伊斯兰国炼油厂的空袭并未大幅削减恐怖组织的经济收入，因为该恐怖组织建造了临时炼油厂继续在黑市上出售石油，而这与所公布的声明大相径庭。
Last year, officials said, Mr. Hooker's team concluded that despite public statements to the contrary, airstrikes against Islamic State-held refineries had not significantly weakened the terrorist group's finances because it had built makeshift refineries to sell oil on the black market.