A security company and a...union are facing a federal prosecution for a litany of workers' rights abuses. The prosecution comes in the wake of a series of charges filed with the National Labor Relations Board...by three security guards...[that] filed the charges after their employer, AlliedBarton Security Services, entered into a monopoly bargaining agreement with the United Protective Workers of America...The agreement...requires AlliedBarton security guards working at Ford Motor...to join the UPWA union and pay full union dues as a condition of employment...UPWA union and company officials promoted union members, and union members received signing bonuses, but nonmembers were explicitly denied job promotions and signing bonuses on account of their union membership status...[A] group of security guards circulated a petition to remove the UPWA union from their workplace, union officials spied on, interrogated, and threatened workers who supported the effort.