Colonel Donovan climbed out of the jeep and walked a distance. He was a tall, husky man with powerful shoulders and prematurely gray hair. His face was hard and weather-beaten, and his eyes held the only hint of his intelligence. He did not have the delicate features and slender fingers of an intellectual, but his gray eyes were cold and alert. He had climbed to the rank of colonel partly by his physical strength and partly by that deceptive intelligence. He had an aggressive way of tackling a problem, a way of prodding it and beating it with his mind as if it were a physical thing and he were beating it with his fists. During his career, he had solved numerous problems with his different approach. The intellectuals, the men who solved problems, had minds as alike as if they had been cut from the same pattern. A definite type of physique produced a definite mentality-type, and a definite mentality-type produced a definite way of thinking. The intellectuals were similar in body and mind, and their answers were often too similar. When the UN wanted a _different_ answer, it called upon men such as Donovan. And Donovan had a new problem. He lit a cigarette without looking away from the ruins. The ruins of Fort Meade; he could see at a glance that it had been a direct hit. Every building had been leveled, the ground scorched and fused into weird glass-like substances. There had been no burial details: of all the thousands of soldiers at the Fort, there had been no remains to bury. He had no special purpose in viewing the ruins except to goad his mind. Reports on his desk in the New Pentagon had informed him of the facts: seven military bases such as Fort Meade had been bombed by the Antarians. All direct hits. It meant one of two things. One: the Antarians could take a photograph of Earth from a thousand miles and spot military installations on that photograph. Two: they had tortured prisoners and learned the locations. Number one was improbable; number two was very probable. He wondered, _How do you prevent a man from giving information?_ It was an important problem. There seemed to be no way to prevent the Antarians from taking prisoners, no way to prevent them from torturing prisoners. If they captured enough prisoners, they could learn the location of every military base and war plant on Earth. Every soldier knew the location of something vital; almost every soldier could point to it on an aerial map. It was a simple matter of spotting rivers and mountain ranges and judging distances.