https://www.reuters.com/article/us-zuckerberg-kenosha/zuckerberg-says-facebooks-failure-to-remove-militia-page-an-operational-mistake-idUSKBN25O2ZJ >Facebook Chief Executive Officer Mark Zuckerberg said on Friday the company was at fault for not removing the page and event for a militia group before two people were killed at a protest in Kenosha and deemed it "largely an operational mistake".