[Tim Taylor, London:] Hello, my name is Tim Taylor. I'm from London, U.K.. And my question is: Why are all dollar bills the same color and the same size?
[Thomas Harris, Deputy Director, Bureau Of Engraving & Printing:] That's a very good question, Tim. It's one that we hear quite frequently here at the bureau. It would be difficult to determine exactly why the decision was made in the beginning, in 1929 when the notes were standardized. However, when one looks at the infrastructure in the cash system, it's easy to see the investment of hundreds of millions of dollars and processing equipment for transit authorities or vending operations or cash systems all over the world, including ATM dispensers. As for the color, the green and black the traditional green and black colors of U.S. currency is now a symbol of stability, and is an expectation that the American people have.