Israel at war, day 301: U.S. officials say Iran may use proxies in retaliation attack

U.S. officials: Iran could use proxies to attack U.S. forces, Israeli targets ■ Hezbollah chief vows response to killing of senior commander ■ IDF says it killed senior Palestinian Islamic Jihad member in south Gaza ■ Biden speaks with Netanyahu on new defensive military deployments to support Israel ■ Here's what you need to know 301 days into the war