In 1971, D.B. Cooper jumped out of an airplane with $200,000 in ransom money. Today, the hijacking is the only unsolved air piracy case in the United States. Learn more in Investigating the D.B. Cooper Hijacking, a World’s Greatest Mysteries book.
Other Titles in the Series

Investigating the Bermuda Triangle
9781489699831

Investigating the D.B. Cooper Hijacking
9781489699954