Six months after the Japanese attack on Pearl Harbor, the June 7, 1942, edition of the Chicago Sunday Tribune trumpeted news of a stunning American victory over a Japanese armada at the Battle of Midway.
"Jap Fleet Smashed by U.S.; 2 Carriers Sunk at Midway: 13 to 15 Nippon Ships Hit; Pacific Battle Rages," the front-page headlines read. And in the center of the page, an intriguing side story: "Navy Had Word of Jap Plan to Strike at Sea."
It was a fascinating, and detailed, description of much of what American intelligence knew beforehand of the enemy's fleet and plans. Indeed, it was too detailed.
The report - 14 paragraphs long - suggested a...