was asked why the death of innocent men, women, and children from a chemical weapon warrants a u.s. response, the deaths of more from barrel bombs not warrant a military response, and that's when secretary maddis said what they've all been saying. it's all about chemical weapons. >> even in world war ii, chemical weapons were not used on battlefields, even in the korean war, they were not used on battlefield. since world war i there's been an international convention on this. >> he didn't mention vietnam for a reason. he knows how much it was used in the vietnam war by the united states of america. the use of nay palm was chemical war fair. it was the product of the dough chemical company.