NEW STAMP CANCELLATION

Dressed in period costums, Stephen Powell and Venetia McEntire display the new Lewis and Clark cancellation on a postcard as the U.S. Postal Service begins to honor the bicentennial of the exploration led by Meriwether Lewis and William Clark on most of St. Louis' mail at the Main Post Office in St. Louis on April 27, 2004. The Postal Service will use the special cancellation for about two months with stamp sales of a Lewis and Clark commemorative stamp going on sale on May 14. (UPI Photo/Bill Greenblatt)