we found abu hassan in a refugee camp with his family, at least what remained of his family. he lost two adult sons and a grandson in the gas at khan shaykhun. ( speaking foreign language ) "my son," he told us, "they brought him to a hospital in turkey and he died. his brother, who came to rescue us, well, he got dizzy, collapsed and he died. my grandson also died." his wife, um hassan told us, "my sons were young and these are their children. what was the fault of these children to live without a father? what was their fault?" how do you explain this to these children? "what can we tell them," she said. "this one was injured with us. i told one, your father is dead. he said, 'don't tell me dad is dead! don't say that dad is dead!' but, what can we tell them? how can they understand? we have a neighbor, poor woman, her children, her grandchildren. all 12 in the house died. not a single one lived, not a single one." >> mulet: this is a crime against humanity, using chemical weapons. if we allow this to happen in syria, this might happen somewhere else. and if impunity prevails and people can carry out doing these things without any