Israeli ground forces are attacking Hamas militants and infrastructure in northern Gaza as warplanes strike across the sealed-off territory. Buoyed by the first successful rescue of a captive held by Hamas, Prime Minister Benjamin Netanyahu has rejected calls for a cease-fire and again vowed to crush the militant group’s ability to govern Gaza or threaten Israel. More than half of Gaza’s 2.3 million Palestinians have fled their homes, with hundreds of thousands sheltering in packed U.N.-run schools-turned-shelters or in hospitals alongside thousands of wounded patients. The Palestinian death toll in the Israel-Hamas war has reached 8,525, according to the Hamas-run...