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A firefighter participates in battling wildfire at the Angeles National Forest in Azusa, California, the United States, on July 31, 2020. A wildfire continued to blacken land in the Angeles National Forest. (Xinhua)
A firefighter participates in battling wildfire at the Angeles National Forest in Azusa, California, the United States, on July 31, 2020. A wildfire continued to blacken land in the Angeles National Forest. (Xinhua)