… cause for the crash. It was only the fourth time in history that a report was issued without a firm conclusion … of USAir 427 resulted in the longest investigation in NTSB history. The final report was released four and a half years …
… of these remains the largest underground A-test in U.S. history, sparking the protest movement that led to the … largest atomic device ever detonated in human history—exploded there in October 1961. This was humanity’s …