President and First Lady Ronald and Nancy Reagan stand in front of the Space Shuttle Enterprise to greet the returning shuttle Columbia the fourth...
{"Image ImageDescription": "President and First Lady Ronald and Nancy Reagan stand in front of the Space Shuttle Enterprise to greet the returning shuttle Columbia, the fourth landing of a space shuttle. On this day, the fleet of shuttles was declared operational.   (Photo by Roger Ressmeyer/Corbis/VCG via Getty Images)"}