New $100 bills unveiled by the U.S. Treasury Department include a new blue security strip.
The 3-D strip features tiny Liberty Bells that morph into the number 100 when the bill is tilted, one of several changes that Treasury officials hope will frustrate global counterfeiters. The strip is actually woven into the bill, rather than printed on the paper. 
"We wanted the changes to be very obvious, visible and easy to see," said Larry Felix, director of the Bureau of Engraving and Printing.
The bill - due to debut Feb. 10, 2011 - also features a color-changing inkwell and Liberty Bell to the right of Franklin's familiar visage. An embedded thread to Franklin's left will glow pink when placed under ultraviolet light.