U.S. President Donald Trump announced on the 13th (local time) that he would suddenly resume a maritime blockade targeting Iran in the Strait of Hormuz, a key crude oil transport route in the Middle East. The U.S. Central Command, which oversees the Middle East, carried out large-scale airstrikes against Iran for three consecutive days. The New York Times said that President Trump officially sent a letter to the U.S. Congress last week stating that military action against Iran had resumed on the 7th, and diagnosed that “the ceasefire agreed upon by both sides has in fact been broken, and we are returning to a phase of open armed conflict again.” On the 13th, President Trump announced through Truth Social, “We are resuming the blockade of Iran,” and “From now on, the United States will be known as the ‘GUARDIAN of the Strait of Hormuz.’” On the same day, in an interview with conservative radio host Hugh Hewitt, he said that the memorandum of understanding (MOU) signed with Iran to end the war was “built to test” Iran. The MOU is not an agreement for sustainable peace and negotiations, but rather an opportunity to demonstrate Iran's sincerity.