Hamas military chief Mohammed Deif, an alleged mastermind of the Oct. 7 assault on Israel that triggered the Gaza war, was killed in an airstrike in southern Gaza last month, the Israel military said Thursday. The military and the Israeli security agency Shin Bet said Deif's death was confirmed earlier Thursday, citing an "intelligence assessment.” Deif had survived at least seven Israeli assassination attempts and for decades had topped Israel's most wanted list. Hamas has not commented on...