Mt Vernon in Virginia to Mt Rushmore in the Black hills...............................national parks and politics..............................so many codes and clues........



Ben crashes the President's birthday party at Mount Vernon to convince the President to follow him into a secret tunnel under the House, where he confronts him about the book. The President warns Ben that his actions will be interpreted as an attempt to kidnap the President and Ben is now wanted for committing a federal offense. Ben convinces the President to reveal the location of the book, which is at the Library of Congress.
In the book, Ben finds a picture of the missing plank from the desk and an entry by President Coolidge, who found the plank in 1924, had it destroyed, and commissioned Gutzon Borglum to carve Mount Rushmore to erase the map's landmarks in order to protect the treasure. However, FBI Agent Sadusky tracks Ben to the Library and the three narrowly escape capture.