WICHITA, Kan. (AP) -- A 65-year-old Army and Marine veteran from southeastern Kansas who was preparing for the end of the world will go to prison for possessing incendiary bombs.

The U.S. Attorney's office says Alfred Dutton, of Eureka, was sentenced Monday to 21 months. He pleaded guilty to unlawful possession of unregistered destructive devices.

Investigators reported finding five incendiary bombs last August in Dutton's rented storage unit.

Dutton's lawyer gave U.S. District Judge J. Thomas Marten an excerpt of the National Geographic documentary "Doomsday Preppers" to show his client's state of mind at the time of his arrest.

Dutton was making preparations for the collapse of the economy. Investigators said his apartment was filled with such supplies as nonperishable foods, clothing, medical supplies and other survival items.