"We don't have special effects, but we have real treasures here," says Katie Wilmes, coordinator of public programs at the National Archives. "Those treasures belong to the people."
The "Book of Secrets" opens with Benjamin Franklin Gates (played by Nicolas Cage) learning about a page missing from the diary of John Wilkes Booth. Gates' great-great-grandfather is implicated suddenly as a key conspirator in Abraham Lincoln's death. Determined to prove his ancestor's innocence, Gates follows a chain of clues to Europe.