U.S. Secretary of State Mike Pompeo will postpone his trip to Ukraine and four other countries to continue monitoring the situation in Iraq. The abrupt changes came one day after hundreds of protesters stormed the U.S. embassy in Baghdad. The incident has prompted the United States to send additional troops to the Middle East. Earlier CGTN spoke to Wang Jin, an expert on the Middle East at China's Northwest University. He talked about the U.S. policy in Iraq since the 2003 invasion.