On October 6, 1948, a U.S. Air Force B-29 Superfortress crashed soon after takeoff, killing three civilian engineers and six crew members. In June 1949, the engineers' widows filed suit against the government, determined to find out what exactly had happened to their husbands and why the three civilians had been on board the airplane in the first place. But it was the dawn of the Cold War and the Air Force refused to hand over any documents, claiming...