U.S. Posturing Assets to Defend Israel, U.S. Forces in Middle East Department of DefenseBiden briefed that Iran attack timing and details still unclear, U.S. officials say AxiosUS on fourth aircraft carrier, warships react to Middle East fighting Business InsiderUS passes message to Iran not to escalate at ‘critical moment’ for Middle East Reuters.comBiden, Harris meet with national security team as US watches for Iranian retaliation CNN