Defunct Sun tracking mechanism The memorial as built incorporated motors and jackscrews to constantly track the Sun across the sky in both pan and tilt axes. Parabolic reflectors on the back side of the mirror would then direct the sunlight through the acrylic panels to brilliantly illuminate the honorees' names with sunlight. Supplemental floodlights were used when the sunlight was inadequate. In 1997, the tracking system failed, allowing part of the monument to strike a steel beam on an adjacent platform. Insurance paid $375,000 for repair work, but later, the mechanism again ground to a halt, due to further problems with the slewing ring. Estimated cost of repairs was around $700,000, and the Astronauts Memorial Foundation unanimously decided the money would be better spent on educational programs instead. The floodlights were repositioned and are kept burning 24 hours a day to illuminate the memorial. Memorial funding The Space Mirror Memorial cost $6.2 million. The memorial was to be partially funded by the sales of "Space Shots" trading cards. An agreement was made for 25% of Space Shots profits, in exchange for guaranteeing a $160,000 loan. A projected $400,000 was owed to the Foundation, which was never paid. The Space Mirror Memorial and the Astronauts Memorial Foundation are funded in part by a specialty vehicle registration plate issued by the state of Florida. Called the Challenger plate, it was first issued in 1987, and was the first specialty plate issued by the state. The third edition, introduced in 2004, includes Columbia in the text, and is now termed the Challenger/Columbia plate. License plates brought in $377,000 in 2009. One quarter of the revenue from the Apollo 11 Fiftieth Anniversary commemorative coins will go to the Astronauts Memorial Foundation. Honorees Only those killed during human spaceflight missions or during training for such missions sponsored by the United States are eligible for inclusion in the memorial. For a comprehensive list of space disasters, see List of space disasters. The people honored on the memorial are: Theodore Freeman, one of the NASA Astronaut Group 3 recruits from 1963, died in a T-38 training accident on October 31, 1964. Elliot See and Charles Bassett were killed in a T-38 accident on February 28, 1966, when their aircraft crashed into McDonnell Building 101 on a foggy day. They were originally slated to be the crew of Gemini 9. Bassett was another Group 3 recruit, whereas See