More than 700 people have been killed in the past day in Gaza due to rapidly expanding Israeli air strikes, according to health officials. This death toll is unprecedented in the decades-long Israeli-Palestinian conflict and could signal an even greater loss of life in Gaza once Israeli ground forces launch an expected offensive into the territory. The fighting has killed more than 1,400 people in Israel, mostly civilians killed during the initial Hamas attack. US officials are having 'active conversations' with Israeli counterparts about the potential ramifications of escalated military action.