anchor: israel and hamas have traded blame for the collapse of the truce, with america's top lemat accusing of reneging on its -- top diplomat accusing hamas of reneging on its commitment. the secretary of state urged israel to implement clear protections for civilians. >> as we seen today, israel has moved out on part of that, including sending out information and making it clear where people could be in safe areas in gaza. anchor: the u.n. has called the situation in gaza catastrophic as airstrikes resume and thousands of displaced people struggle to find food, shelter and clean water. the head of philanthropy for palestinian refugees in the u.s. for the u.n. told us more earlier. thank you for joining us. can i begin by expressing our condolences to you for the loss of your brother, his wife and children who were killed in gaza last week. this conflict is thousands of miles away, but for you in so many outside of the region, it is still very raw and very real. >> yes, and i appreciate your sympathy. it's been almost eight days now and every day i learned about grief, it is very sneaky. i