FILE - In this Nov. 29, 1999, file photo, Adelaide Chen of Oakland, Calif., center, wearing a sea turtle costume to protest the treatment of animals by WTO countries, stands with others during a protest against the World Trade Organization in Seattle.  Saturday, Nov. 30, 2019 marks 20 years since tens of thousands of protesters converged on Seattle and disrupted a major meeting of the World Trade Organization. The protesters' message was amplified not just by their vast numbers but by the response of overwhelmed police, who fired tear gas and plastic bullets and arrested nearly 600 people. Two decades later, many of their causes are still relevant. (AP Photo/Beth A. Keiser, File)