cities were on alert on Thursday as "Joker" opened in movie theaters after weeks of publicity surrounding its disturbing portrait of a bullied loner raised fears it might spark violence.
Officers wearing helmets and armed with assault rifles stood outside a screening of "Joker" at the New York Film Festival on Wednesday night, where audiences had their bags searched and K9 officers were on duty, video footage showed. Costumes and face masks have been banned for moviegoers at two U.S. theater chains - AMC and Landmark - while the Alamo Drafthouse cinema group warned parents not to bring their children.
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