U.S. Defense Secretary Lloyd Austin has ordered a guided-missile submarine to head to the Middle East and for a strike group of fighter jets and Navy warships to sail more quickly to the region as Israel is bracing for possible retaliatory strikes from Iran and Hezbollah after Israel assassinated Hamas leader Ismail Haniyeh in Tehran and a top Hezbollah commander in Beirut. On Friday, Israel continued its assassination campaign by killing a Hamas commander in the Lebanese city of Sidon.