Syria again challenges Obama’s ‘red line’ on chemical weapons

President Obama’s “red line” for Syria is once again being tested after rebel forces said Wednesday that the regime of President Bashar Assad used poison gas to attack civilians near Damascus, killing potentially hundreds in what could turn out to be the deadliest deployment of chemical weapons yet.
Adding to the pressure on the White House were videos supplied by rebels showing victims convulsing and choking, and powerful photos of children wrapp