Nova: Saving the National Treasures (DVD)

America's most revered public documents - the Declaration of Independence, Bill of Rights, and Constitution - were threatened by the ravages of time, until a unique team of conservators, engineers, and historian intervened. In this compelling documentary, NOVA cameras captured the controversial five-year project to design state-of-the-art protective casements for the deteriorating documents.

Nova: Saving the National Treasures (DVD)