US and Israel on high alert as Iran prepares retaliation following Hamas leader's killing

Iran has vowed to avenge the death of Ismail Haniyeh, a senior Hamas leader killed in Tehran, and has issued an order for Iran to strike Israel directly. This has led to fears of a broader regional war, with Israel facing threats from Iran to avenge assassinations of Hamas and Hezbollah leaders. The US has promised to provide new defensive military deployments to Israel, including additional ballistic missile defense-capable cruisers and destroyers.