Policemen take part in a multi-agency active shooter response training at Los Angeles City Hall in Los Angeles, the United States, March 16, 2019. More than 120 police officers from various agencies took part in the training. (Xinhua/Zhao Hanrong)
Policemen take part in multi-agency active shooter response training in Los Angeles, U.S.
Source： Xinhua| 2019-03-18 19:24:52|Editor: Shi Yinglun
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