Mayor of U.S. city of San Francisco dies at 65

Flags fly at half mast to mourn the mayor of San Francisco Ed Lee in San Francisco, the United States, on Dec. 12, 2017. Ed Lee, the first Asian American mayor of San Francisco in the U.S. state of California, died unexpectedly early Tuesday morning at the age of 65 after suffering a heart attack, local TV reported. (Xinhua/Wu Xiaoling)