The discovery of reporter George Weller's firsthand account of conditions in post-nuclear Nagasaki sheds light on one of the great journalistic betrayals of the last century: the cover-up of the effects of the atomic bombing on Japan. On Aug. 6, 1945, the U.S. dropped an atomic bomb on Hiroshima; three days later, Nagasaki was hit. Gen. Douglas MacArthur promptly declared southern Japan off-limits, barring the news media. More than 200,000 people died in the atomic bombings of the cities, but no Western journalist witnessed the aftermath and told the story. A month after the bombings, two reporters defied General MacArthur and struck out on their own. Mr. Weller, of the Chicago Daily News, took row boats and trains to reach devastated Nagasaki. Independent journalist Wilfred Burchett rode a train for 30 hours and walked into the charred remains of Hiroshima. Both men encountered nightmare worlds. Mr. Burchett's article, headlined The Atomic Plague," was published Sept. 5, 1945, in the London Daily Express. The story caused a worldwide sensation and was a public relations fiasco for the U.S. military. So when Pulitzer Prize-winning reporter George Weller's 25,000-word story on the horror that he encountered in Nagasaki was submitted to military censors, General MacArthur ordered the story killed, and the manuscript was never returned. Recently, Mr. Weller's son, Anthony, discovered a carbon copy of the suppressed dispatches among his father's papers (George Weller died in 2002).