If labor and management cannot reach an agreement through collective bargaining, and negotiations break down, either side may use specific tactics to enhance its negotiation position and perhaps sway public opinion. Labor and management have a variety of strategies to use when they fall to reach an agreement during negotiations. Labor has options to call for strikes or boycotts. Management can use lockouts, injunctions, or strikebreakers when negotiations fail. Match the tactic being used to each of the situations being described. Major airline Primary boycott Detroit mayor Lockout MLB Strike Walmart Strikebreakers United Airlines Injunction Verizon Secondary boycott National Basketball Association Givebacks