(CNN) -- The gruesome images are clear. There's little doubt Syrians suffered a chemical attack last month. But videos of the aftermath -- including 13 shown to Congress -- do nothing to show who was responsible. President Barack Obama says he has "high confidence" that the regime is to blame -- the strongest position short of confirmation. But his administration has not released hard evidence. Secretary of State John Kerry says declassifying any more information could endanger "sources and methods" of U.S. intelligence gathering. Britain, France and NATO also blame Syrian President Bashar al-Assad for the horror in a Damascus suburb last month.
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Americans have not seen the evidence the Obama administration describes
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Two U.S. officials differ on "reasonable doubt"
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Obama has "high confidence," the strongest position short of confirmation
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"No way in hell" the U.S. knows such a specific death toll, a former defense official says
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Americans
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Still, as Obama engages in a full-court press to build U.S. support for strikes, some @placeholder hear echoes of a different basketball analogy: "slam dunk."
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And that is why our intelligence community has scrubbed and re-scrubbed the evidence," @placeholder told Congress.
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And that is why our intelligence community has scrubbed and re-scrubbed the evidence," Kerry told @placeholder.
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On August 21, a @placeholder regime element prepared for a chemical weapons attack in the Damascus area, including through the utilization of gas masks."
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@placeholder, British, and French intelligence reports all agree that the opposition couldn't have pulled off such an attack.
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U.S., British, and @placeholder intelligence reports all agree that the opposition couldn't have pulled off such an attack.
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And it says the United States assesses "with high confidence that the @placeholder regime has used chemical weapons on a small scale against the opposition multiple times in the last year, including in the Damascus suburbs.
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This assessment is based on multiple streams of information including reporting of @placeholder officials planning and executing chemical weapons attacks and laboratory analysis of physiological samples obtained from a number of individuals, which revealed exposure to sarin.