U.S. national flag flies at half-mast to mourn for mass shooting victims in El Paso and Dayton

A U.S. national flag flies at half-mast above the White House to mourn for the mass shooting victims in El Paso and Dayton, Washington D.C., the United States, on Aug. 4, 2019. Two mass shootings in the United States left 29 people dead and dozens injured. (Photo by Ting Shen/Xinhua)