US Vice President JD Vance has again signaled that the White House is prepared to use force against Iran if diplomacy fails, raising the stakes around a 60-day memorandum of understanding (MOU) that has halted open hostilities but left the core disputes unresolved. WASHINGTON -- US Vice President JD Vance has again signaled that the White House is prepared to use force against Iran if diplomacy fails, raising the stakes around a 60-day memorandum of understanding (MOU) that has halted open hostilities but left ... [7960 chars]