Almost a year ago, Walmart closed five of its stores. Employees filed a complaint with the National Labor Relations Board (NLRB) stating that the company closed these locations in response to workers striking. Walmart initially claimed that it closed these locations due to plumbing and maintenance issues. Close to a year later, the company will be reopening those stores but it claims that this has nothing to do with the complaint that was filed with the NLRB.
See "Walmart to Reopen 5 Stores Named in Union Complaint", September 3, 2015