On November 24, 1971 a man calling himself Dan Cooper hijacked Northwest Flight 305 traveling from Portland to Seattle. After demanding $200,000 in cash and four parachutes, Cooper exited the plane at 10,000 feet. No one ever heard from him again. Now, after nearly 40 years of speculation, private investigator Skipp Porteous has solved the mystery of D.B. Cooper in Into the Blast. Together with co-author Robert Blevins, Porteous lays the case that Kenny Christiansen, a Northwest Airlines employee, was the legendary skyjacker.