After 100 days of the Israel-Hamas war, the toll on civilians keeps getting worse. The World Health Organization warns that Gaza could be on the brink of famine. Meanwhile the United Nations is desperately trying to plug the aid gap, in Ukraine and in other war zones. UN Humanitarian chief Martin Griffiths speaks to Christiane about the alarming rise of war amid the failure of diplomacy.   

Also on today's show: journalist Emily Wu; actor Sandra Hüller; political reporter Astead Herndon 

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