WASHINGTON/TEHRAN: The fragile calm between Washington and Tehran cracked again on Monday, after President Donald Trump warned that a US military blockade of Iran would continue until Tehran accepted either a deal or, in his words, complete surrender. The remarks came just hours after Iranian officials publicly denied that any negotiations with the United States were underway. Trump, clearly irritated by Iran’s denial, accused Tehran of being dishonest, insisting that talks were happening whether Iran wanted to acknowledge it or not. Iran continues to insist that any resolution must include recognition of its control over the Strait of Hormuz, a vital corridor for global energy shipments. Whether that fragile thread holds may determine if the two nations edge toward peace, or spiral back into open conflict.