The United Nations says more than 360,000 Gazans who fled to Rafah have now been forced to flee again as Israeli troops attack sectors of the city in a bid to rout Hamas. Also in Rafah, the first foreign U.N. staff member was killed by Israeli troops. More than 100 Palestinian U.N. staff have been killed since Oct. 7. Nick Schifrin reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders