In UPS v. Calhoun, the plaintiff (who worked at the UPS facility in Greensboro) had filed a complaint with OSHA that he had been retaliated against for engaging in daily vehicle inspections that he thought necessary for vehicle safety. He claimed that such activity was protected by the Surface Transportation Assistance Act (STAA). The Department of Labor ultimately rejected plaintiff’s claim, and the 4th Circuit affirmed the DOL’s decision.