Moqadi Mokoena had been feeling uneasy all day. When he’d left his home on the outskirts of Johannesburg, South Africa, for his job as a security guard, he’d had to turn around twice, having forgotten first his watch and then his cigarettes. He had reason to be nervous. His supervisor had assigned him to join a squad protecting an electrical substation where, just two days earlier, four other guards had been stripped naked and beaten with pipes by gun-wielding thieves. Now, on this day in May of 2021, Mokoena and a fellow guard were at that substation, peering tensely through their truck’s windshield as a group of armed men