A girl holds a sign during a "Families Belong Together" march in Los Angeles, the United States, on July 21, 2018. Thousands of demonstrators marched on Saturday to protest against separating children from their parents at the U.S.-Mexico border. (Xinhua/Zhao Hanrong)

A woman dressed as Superwoman feeds her baby during a "Families Belong Together" march in Los Angeles, the United States, on July 21, 2018. Thousands of demonstrators marched on Saturday to protest against separating children from their parents at the U.S.-Mexico border. (Xinhua/Zhao Hanrong)

A girl holds a sign during a "Families Belong Together" march in Los Angeles, the United States, on July 21, 2018. Thousands of demonstrators marched on Saturday to protest against separating children from their parents at the U.S.-Mexico border. (Xinhua/Zhao Hanrong)