Workers at Wal-Mart stores in three states have launched what organizers are calling their longest strike to date. The group, OUR Walmart, says around 100 workers in Florida, Massachusetts and California have begun walking off the job for an unprecedented series of “prolonged strikes” against worker retaliation. The current wave of strikes could continue through next week, when workers and activists are expected to protest at Wal-Mart’s annual shareholder meeting in Arkansas.