One of the most popular bills in the collection is the $2 bill that ground crew member Joe Tramel put aboard John Glenn's capsule for his famous space flight -- becoming the first American to orbit the Earth. Joe and millions of American's were taken with Glenn and his flight, and none taken so much like Lightnin' Hopkins, the great blues singer. Hopkins was so taken with Glenn's flight, that he wrote a wonderful, foot-stomping song to celebrate the mission titled "Happy Blues for John Glenn." Check it out if you haven't heard it. It makes for nice listening as you read about Glenn's flight and visit the $2 bill that went along for the ride!