The president also reiterated his "high confidence" that the Syrian government used chemical weapons against its own people, and added that it posed a serious national security threat to the US and to the whole Middle East region.
"I just wanted to make it clear that it posed serious risks".
He said he was not convinced that it posed an imminent threat.
But he agreed that it posed a "very tricky" distribution challenge.
Rwanda angrily denounced the report, known as the Mapping Exercise, and warned that it posed a threat to regional stability.
Invariably, the reason cited was that it posed a "security risk," even though the activities were meant to alleviate aggression.
Even after it became clear that OxyContin was being widely abused, Purdue refused to concede that it posed risks.
Board of Education officials acknowledged the contamination yesterday, but denied that it posed a hazard to those in the building.
Ms. Hochul quickly seized on the plan, warning that it posed a danger to older people, in a district that was home to many elderly residents.
Though the water in many homes still smelled of licorice, state officials told the public that it posed no obvious health risk.
The day before, 20 Nobel Prize winners, meeting in London, warned that it posed as great a threat as nuclear war.
