Are Syria's rebels using chemical weapons?

A U.N. official adds another explosive claim to an already escalating international conflict

Free Syrian Army fighters head towards the frontline in Damascus on May 5.
(Image credit: REUTERS/Ward Al-Keswani)

The U.S. appears to be moving toward at least arming the anti-government forces in Syria trying to topple President Bashar al-Assad, and perhaps leading Western airstrikes on Syria. President Obama, long reluctant to directly involve the U.S. in Syria's bloody civil war, is being forced to reconsider in large part because of mounting evidence that sarin nerve gas or other chemical weapons have been used in the conflict.

Two apparent Israeli airstrikes on the outskirts of Damascus since Friday are ramping up the pressure — and the geopolitical tension — but the bigger impetus to act is that the use of chemical weapons, at least in large quantities, is a "red line" that Obama laid out in August — reportedly in an off-the-cuff response to a reporter's question. "Unfortunately, the red line that the president of the United States [drew] was apparently written in disappearing ink," Sen. John McCain (R-Ariz.) said on Fox News Sunday.

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Peter Weber, The Week US

Peter has worked as a news and culture writer and editor at The Week since the site's launch in 2008. He covers politics, world affairs, religion and cultural currents. His journalism career began as a copy editor at a financial newswire and has included editorial positions at The New York Times Magazine, Facts on File, and Oregon State University.