of using chlorine as a weapon. and it is civilians who continue to pay the heaviest price in this conflict. we must warn you that some of the images you're about to see are disturbing. images that the world has seen time and time again out of syria, another strike, another rescue of a bloody child whose name we nay never know. eastern ghouta has become a kill box. people here say they've never seen a week like this before. activists have been trying to document what life, if one can call it that, is like for civilians here. in underground shelters, they hope they will survive. it's a miserable existence. >> there is no drinking water. we try our best to give children a little bit to drink. we eat once a day or we don't eat at all. >> when the air strikes stop, the brave and desperate venture