In a video posted to Facebook on Friday, Facebook chief executive Mark Zuckerberg said that the social media giant made a mistake by not removing a page and event that urged people in Kenosha, Wis., to carry weapons amid protests. On Tuesday night, a 17-year-old named Kyle Rittenhouse allegedly fatally shot two people and injured a third. Zuckerberg admitted that “a bunch of people” had reported the page and said the decision to not remove it was “largely an operational mistake.” “The contractors, the reviewers who the initial complaints were funneled to, didn’t, basically, didn’t pick this up,” Zuckerberg said in the Friday video, which was taken from a larger company-wide meeting.