Saturday on PBS News Weekend, as residents of Gaza flee Israel's impending ground invasion, U.S. Defense Secretary Lloyd Austin declares unwavering support for the Jewish state's fight against Hamas. Then, a new study reveals how gender affects how cancer patients are treated. Plus, why thousands of undocumented immigrants are being held in jail as potential witnesses in human smuggling cases. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders