SARATOGA SPRINGS, N.Y. — John J. Wilpers Jr. went decades without publicly revealing details about his international headline-making exploits at the end of World War II, a string of silence befitting a former Army intelligence officer-turned-career CIA employee. It took the belated awarding of a Bronze Star to the upstate New York native to finally loosen the lips of the man credited with preventing former Japanese prime minister Hideki Tojo from committing suicide on Sept. 11, 1945, nine days after Japan officially surrendered. Tojo was eventually put on trial for war crimes and executed in 1948. "I never wanted it...