WASHINGTON -- The intelligence linking Syrian President Bashar Assad or his inner circle to an alleged chemical weapons attack that killed at least 100 people is no "slam dunk," with questions remaining about who actually controls some of Syria's chemical weapons stores and doubts about whether Assad himself ordered the strike, U.S. intelligence officials say.
President Barack Obama declared unequivocally Wednesday that the Syrian government was responsible, while laying the groundwork for an expected U.S. military strike.
"We have concluded that the Syrian government in fact carried these out," Obama said in an interview with "NewsHour" on PBS.
"And if that's so, then there need to be international consequences."
However, multiple U.S. officials used the phrase "not a slam dunk" to describe the intelligence picture -- a reference to then-CIA Director George Tenet's insistence in 2002 that U.S. intelligence showing Iraq had weapons of mass destruction was a "slam dunk" -- intelligence that turned out to be wrong.
A report by the Office of the Director for National Intelligence outlining that evidence against Syria is thick with caveats. It builds a case that Assad's forces are most likely responsible while outlining gaps in the U.S. intelligence picture. Relevant congressional committees were to be briefed on that evidence by teleconference call on Thursday, U.S. officials and congressional aides said.
The complicated intelligence picture raises questions about the White House's full-steam-ahead approach to the Aug. 21 attack on a rebel-held Damascus suburb, with worries that the attack could be tied to al-Qaida-backed rebels later.