In the summer of 1960, Sidney Gottlieb, a C.I.A. chemist, flew to Congo with a carry-on bag containing vials of poison and a hypodermic syringe. It was an era of relative subtlety among C.I.A. assassins. The toxins were intended for the food, drink, or toothpaste of Patrice Lumumba, Congo’s Prime Minister, who, in the judgment of the Eisenhower Administration, had gone soft on Communism. Upon his arrival, as Tim Weiner recounts in his history of the C.I.A., Gottlieb handed his kit to Larry Devlin, the senior C.I.A. officer in Léopoldville. Devlin asked who had ordered the hit. “The President,” Gottlieb assured him. In later testimony, Devlin said that he felt ashamed of the command. He buried the poisons in a riverbank, but helped find an indirect way to eliminate Lumumba, by bankrolling and arming political enemies. The following January, Lumumba was executed by the Belgian military.