The Postal Service issued a $2.90 Priority Mail stamp on June 3, 1993, at the Kennedy Space Center in Florida. The issuance was in conjunction with a Space Shuttle launch scheduled that day. The stamp features a futuristic shuttle in space.
The stamp was designed by artist Ken Hodges of Los Alamitos, CA and printed in the offset/intaglio process at the Bureau of Printing and Engraving and was issued in sheets of 40.
Reference: Postal Bulletin (May 27, 1993).