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.
Still, as Obama engages in a full-court press to build U.S. support for strikes, some Americans hear echoes of a different basketball analogy: "slam dunk."
That's how then-CIA Director George Tenet described what turned out to be flawed intelligence that Iraq had weapons of mass destruction in the run-up to the war 10 years ago.
Kerry and Defense Secretary Chuck Hagel were senators at the time.
"We are especially sensitive, Chuck and I, to never again asking any member of Congress to take a vote on faulty intelligence. And that is why our intelligence community has scrubbed and re-scrubbed the evidence," Kerry told Congress.
Some lawmakers remain skeptical.
"The administration is asking us to go to war on the basis of a four-page document and a 12-page document and none of the underlying evidence," Rep. Alan Grayson, D-Florida, complained on CNN's New Day Saturday.
"They have evidence showing the regime has probably the responsibility for the attacks. They haven't linked it directly to Assad, in my estimation," Rep. Buck McKeon, R-California, told CNN's State of the Union Sunday.
Beyond a reasonable doubt or no? U.S. says both
White House Chief of Staff Denis McDonough said the intelligence passes a "common sense test."
"Now, do we have a picture or do we have irrefutable, beyond a reasonable doubt evidence? This is not a court of law. And intelligence does not work that way," he told CNN's State of the Union.
But Kerry said last week, "We can tell you beyond any reasonable doubt that our evidence proves the Assad regime prepared for this attack, issued instructions to prepare for this attack, warned its own forces to use gas masks."
Kerry says the amount of information that's been declassified is "unprecedented."
That information boils down to summaries of what the evidence is.
'Concrete' evidence: Described, not declassified
Physical, "concrete" evidence shows where the rockets came from, when they were fired, and that not one landed in regime-controlled territory, Kerry said.
"Satellite detections corroborate that attacks from a regime-controlled area struck neighborhoods where the chemical attacks reportedly occurred," a declassified White House report says. "... The lack of flight activity or missile launches also leads us to conclude that the regime used rockets in the attack."
The White House released a map, but no satellite images.
The report also cites "multiple streams of intelligence," without giving specifics.
"In the three days prior to the attack, we collected streams of human, signals and geospatial intelligence that reveal regime activities that we assess were associated with preparations for a chemical weapons attack," the U.S. report says.