Former US Secretary of State Hillary Clinton backed President Barack Obama's attempts to seek military action against Syria and urged Congress to support him.
In a White House event about wildlife trafficking, Clinton diverted from the subject to comment on efforts to pressure Syria.
It would be an "important step" if the Syrian government of President Bashar al-Assad immediately ceded control of chemical weapons, she said.
"The Assad regime's inhumane use of weapons of mass destruction against innocent men, women and children violates a universal norm at the heart of our global order," Clinton said.
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The Labour leader said newspapers were going "a little bit James Bond" over the "increasingly wild and entirely false" claims.
The "astonishing" find was made during an excavation at Vindolanda, near Hexham in Northumberland.
A High Court judge has ruled that doctors can stop providing life-support treatment to Alfie Evans against his parents' wishes.