On a fateful day in November 1971, a man identifying himself as Dan Cooper walked into the Portland International Airport and purchased a one-way ticket to Seattle. Little did anyone know, this seemingly mundane event would soonafter引爆了一个 mystery that would captivate the nation and endure for decades. The story of D.B. Cooper is one of the most fascinating and perplexing cases in aviation history, a blend of fact and speculation that has birthed countless theories and captured the imaginations of many.