they didn't do it. the russian government says they didn't do it. a chemical attack in a town held by the syrian government. syrian officials have their own explanation that the rebels did it. that they poisoned and killed those children in such a horrific way to convince other countries to get their milita militaries involved in this civil war, fred planken is the only american reporter in damascus. >> reporter: i don't think anybody's buying that the rebels themselves were behind this. it's interesting because we were speaking about there last night and how this whole event unfolded. witnesses said that a syrian government helicopter flew over