Certain of gas attack, allies struck Syria before UN report

Skies erupt with surface to air missile fire Saturday as the U.S. launches an attack on Syria targeting different parts of the Syrian capital Damascus, Syria. (AP Photo/Hassan Ammar)

WASHINGTON — The United States, Britain and France opted to strike Syria for its apparent use of chemical weapons without waiting for a report from U.N. inspectors because they were convinced that the Assad government had used chlorine and sarin nerve gas against a rebel-held Damascus suburb, American officials said Saturday.