January 6 rioters used video sharing app TikTok to recruit participants and even warned them to bring guns to the Stop the Steal rally that preceded it, the Department of Homeland Security says. DHS's Office of Intelligence and Analysis filed a report this April highlighting concerns that violent content was growing on the Chinese-owned social media platform, from promoting the riot and acts of terrorism to instructing others how to build bombs and sabotage railroad tracks. The five page report, obtained by the Property of the People transparency watchdog group and shared with Politico Thursday, comes as federal authorities examine...