People protest against U.S. strike on Syria outside the White House in Washington D.C., the United States, on April 14, 2018. The United States launched precise strike in cooperation with Britain and France against Syrian military facilities on Friday. [Photo / Xinhua]

A man holds a poster during a protest against U.S. strike on Syria outside the White House in Washington D.C., the United States, on April 14, 2018. The United States launched precise strike in cooperation with Britain and France against Syrian military facilities on Friday. [Photo / Xinhua]

People protest against U.S. strike on Syria outside the White House in Washington D.C., the United States, on April 14, 2018. The United States launched precise strike in cooperation with Britain and France against Syrian military facilities on Friday.[Photo / Xinhua]

People protest against U.S. strike on Syria outside the White House in Washington D.C., the United States, on April 14, 2018. The United States launched precise strike in cooperation with Britain and France against Syrian military facilities on Friday. [Photo / Xinhua]

People protest against U.S. strike on Syria outside the White House in Washington D.C., the United States, on April 14, 2018. The United States launched precise strike in cooperation with Britain and France against Syrian military facilities on Friday.[Photo / Xinhua]

A kid holds a poster during a protest against U.S. strike on Syria outside the White House in Washington D.C., the United States, on April 14, 2018. The United States launched precise strike in cooperation with Britain and France against Syrian military facilities on Friday. [Photo / Xinhua]