A special pictorial cancellation is available through Houston's main general post office (GPO) on Franklin Street for all mailed-in requests to commemorate and honor the 25th anniversary of the loss of space shuttle Challenger and its STS-51L crew.
The cancellation was designed by artist Detlev Van Ravenswaay.
Requests should mailed to the address below with proper postage affixed (44 cents for covers; 28 cents for postcards; or 98 cents First Class International) and it is recommended that stamped return addressed return outer envelopes or packaging is provided by the sender.
Challenger 25 Years Station
401 Franklin Street
Houston, Texas 77201-9998
Due to anticipated volume, it may take up to a few weeks for postal personnel to process all of the requests.