The combatants in Syria are pointing fingers at each other. Syrian officials claim that the rebels used chemical weapons in a March 19th attack against Khan al-Assal, a town near Aleppo; the rebels say the Syrian government was the culprit. Whichever is the case, at least 25 people died and many others were wounded in the assault. The UN has decided to investigate: Secretary-General Ban Ki-moon appointed Swedish scientist Ake Sellstrom, a former weapons monitor for the UN Special Commission on Iraq (UNSCOM), to lead the investigation.