Disney has sent us two new featurette clips for their upcoming action-adventure National Treasure: Book of Secrets, which opens on December 21st:

In "Missing 18 Pages," watch as the cast and crew of National Treasure: Book of Secrets, as well as historians and scholars of John Wilkes Booth, discuss the missing 18 pages from the diary found on Booth on the scene of President Lincoln's assassination.

In "Internet Featurette," join your favorite characters from National Treasure: Book of Secrets on an international journey to solve the mystery behind the alleged implications of the Gates' family to the Lincoln assassination.

Missing 18 Pages featurette

Internet Featurette

In this follow up to the box-office hit National Treasure, treasure hunter Ben Gates (Nicolas Cage) once again sets out on an exhilarating, action-packed new global quest to unearth hidden history and treasures.

When a missing page from the diary of John Wilkes Booth surfaces, Ben's great-great grandfather is suddenly implicated as a key conspirator in Abraham Lincoln's death. Determined to prove his ancestor's innocence, Ben follows an international chain of clues that takes him on a chase from Paris to London and ultimately back to America. This journey leads Ben and his crew not only to surprising revelations - but to the trail of the world's most treasured secrets.