21 and that the regime then intensified the artillery barrage in the area, the report says. The material remains classified. U.S.: Opposition does n't have the capacity ' U.S., British, and French intelligence reports all agree that the opposition could n't have pulled off such an attack. We are certain that none of the opposition has the weapons or capacity to effect a strike of this scale, particularly from the heart of regime territory, Kerry told lawmakers. The White House report points to Syria's known stockpiles of chemical agents. And it says the United States assesses with high confidence that the Syrian regime has used chemical weapons on a small scale against the opposition multiple times in the last year, including in the Damascus suburbs. This assessment is based on multiple streams of information including reporting of Syrian officials planning and executing chemical weapons attacks and laboratory analysis of physiological samples obtained from a number of individuals, which revealed exposure to sarin. We assess that the opposition has not used chemical weapons. In May, a U.N. official said there were strong suspicions that Syrian rebel forces had used sarin gas. But the findings were not conclusive, the U.N. Independent International Commission of Inquiry for Syria said at the time, and the opposition Syrian Coalition condemned any use of chemical weapons. The