Robbi, my wife, worked for #NASA in JSC Houston on the Shuttle Program, and we were always lucky to get some great memorabilia - not just for #STS.
We're just going through the house, room by room trying to work out what is coming to England with us when we move back later this year. Found these NASA items marked "21 IN A ROW".
We are at a loss as to what program this may have been. Will continue to Google.