The tentative agreement worked out by the two sides comes at a moment when the fragile ceasefire between the U.S. and Iran appeared to be wavering, U.S. media reported on May 28, 2026. The tentative agreement worked out by the two sides comes at a moment when the fragile ceasefire between the U.S. and Iran appeared to be wavering, U.S. media reported on May 28, 2026.