WASHINGTON -- President Barack Obama has declared the threat of chemical or biological warfare in Syria a "red line" for the United States. With that statement, he is outlining for the first time the point at which his administration could feel forced to intervene militarily in the Arab country's increasingly messy conflict.
Speaking to reporters Monday at the White House, Mr. Obama warned about the use or deployment of such weapons of mass destruction. He says they risk widening a civil war that already has dragged on for 1½ years and, activists say, killed some 20,000 people. It's widely thought that Syria possesses extensive chemical and biological weapon stockpiles.
Syria has threatened to use them if the country comes under foreign attack.