In the early morning hours of Aug. 16, 1984, a parish priest, a young man named Foubouh Jean and others were riding in a van past Lake Monoun in the Republic of Cameroon, when they noticed a man on the roadside who appeared to be asleep on his motorcycle. But when the priest drew near the motorcycle, he discovered that the man was dead. As he turned back toward the van, he, too, collapsed. Jean and a companion, smelling a strange odor like that of car battery fluid, realized the air was deadly and began to run away. Jean's companion soon succumbed, but Jean managed to escape to the nearby village...