Workers for the largest online retailer in the world are planning to go on strike during one of the busiest shopping weekends of the holiday season. Amazon employees are preparing to protest in 20 countries, including in major cities in the United States, Germany, the United Kingdom, Japan and Brazil, starting on Black Friday over "labor abuses, environmental degradation and threats to democracy," according to UNI Global Union and Progressive International, a Switzerland-based global labor union. Dubbed the "Make Amazon Pay days of resistance," the strike is scheduled to last from Black Friday through Cyber Monday, the union announced in a press release. Demonstrators are calling for increased wages and for employees to be permitted to unionize.