U.S. Secretary of State Antony Blinken is scheduled to arrive in Israel on Sunday to further diplomatic efforts to achieve a ceasefire in Gaza. The U.S., along with mediators Qatar and Egypt, has proposed solutions to bridge the remaining gaps between the warring parties. While cautious optimism exists, U.S. officials warn that more work is needed. Tensions remain high, particularly with Iran, prompting warnings from Washington about potential catastrophic consequences.