Workers at Amazon.coms German operations were set to go on strike on Monday, in the middle of the crucial Christmas holiday season, in a dispute over pay that has been raging for months. The Verdi union said workers would strike in Amazons logistic centres in Bad Hersfeld and Leipzig and, for the first time, in Graben. A delegation of German workers will also protest at Amazons headquarters in Seattle, helped by U.S. workers unions. On Tuesday, workers in Amazons center in the German town of Werne will protest, Verdi said.