For 10 points, name these organizations that collectively bargain to achieve workplace goals.
A leader of one of these groups went missing outside the Machus Red Fox in 1975. Terence Powderly founded one that declined after Chicago police shot at protesters in Haymarket Square, and Jimmy Hoffa once led one called the (*) Teamsters. Wal-Mart switched to selling prepackaged meats after its meatcutters created one of these organizations. For 10 points, name these organizations that collectively bargain to achieve workplace goals.
A leader of one of these groups went missing outside the Machus Red Fox in 1975.
Labor Unions