Built to Last

S15, E29: Enter the amazing and ingenious ultra-sturdy shelters, machines, containers, materials and packaging designed to deny the ruination of society. The drive to create the indestructible has inspired some of the most prolific and awe inspiring results: The Cold War spawned personal bomb shelters in the 1950s. They weren't truly safe and secure, but today's 21st century version will last a millennium. And so will the special food you can get, along with all the comforts of home--like running water, plumbing and electricity. Caskets serve as our final resting place, but how long do they really last? Investigate how valuable data from a plane crash survives in a "black box" (that's not really black), to explain what might have caused the accident. And get an intimate look at the new "home" that protects and preserves one of the world's most valuable documents--the case that houses the original Declaration of Independence.