A man with his face covered points a gun at hostages to simulate an attack during an anti-terrorist drill in a subway in Beijing, April 29, 2015. The drill aimed to test and improve emergency responses. (Photo/CFP)
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A man with his face covered points a gun at hostages to simulate an attack during an anti-terrorist drill in a subway in Beijing, April 29, 2015. The drill aimed to test and improve emergency responses. (Photo/CFP)
