How could a spy get through all that clearance? Frank asked. They...

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Chapter 1 Spies, Submarines and Sailboats "This case is a tough one, boys," said Fenton Hardy, the famous private detective, after he had settled himself comfortably behind the desk in his study. "It concerns our government and possibly a foreign power. Espionage in Washington, that's what it looks like at this point' His sons, Frank and Joe, who were seated in two leather chairs facing their father, perked up. "Can you tell us more about it, Dad, or is it classified?" asked dark-haired Frank, who was a senior in high school. "If so, we won't ask any questions," added Joe, who was blond and a year younger. But he sounded disappointed. Mr. Hardy smiled. "I've cleared you with the Defense Department" he said, "because you may be in on this before it's over. I may need your help." "Great!" Joe said excitedly. "What's your case about?" "A spy in the Pentagon," Mr. Hardy replied. The boys looked at one another in amazement.