He boarded the plane in an era that would look alien to most of us.

There was no long wait for the security line or full body metal detectors.

There were no checkpoints where ID cards were scrutinized over.

He simply paid cash for his ticket, mentioned a fake name, and then stepped on board.

Shortly after getting into the air, the man handed one of the flight attendants a note,

which she quickly tossed unread into her purse.

Man drinking alcohol, handing out phone number was probably something she'd experienced

dozens of times before, but this man shook his head and gestured toward her purse.

Miss, you better look at that note, he said.

I have a bomb.

What happened next has gone down in aviation history.

The man who identified himself as DB Cooper demanded a ransom of $200,000 worth roughly

1.2 million today.

And then, after landing to collect the money and unload the passengers, he had them

take off again.

33 minutes later, he jumped out of the plane and into the pages of history.

The story of DB Cooper defies explanation, and yet that's all people have been doing

for the last 50 years, crafting theory after theory to explain how it all went down,

and what happened to the man when it was over.

Some say he died, while others believe he lived out the rest of his life, slowly spending

his small fortune.

There have been other legends like his over the years.

...