The Gulf countries are preparing for a possible US attack on targets in Iran, the Wall Street Journal writes. The United States is planning a large-scale attack on the Islamic Republic this week. Middle Eastern countries fear devastating retaliatory attacks on their infrastructure, the newspaper notes. Several countries in the region have warned Tehran that they may respond to such attacks independently or jointly with the United States. At the same time, President Donald Trump has not yet made a final decision on the operation, the publication notes.