Nineteen years ago, almost to the day, we lost three astronauts in a terrible accident on the ground. But we’ve never lost an astronaut in flight; we’ve never had a tragedy like this. And perhaps we’ve forgotten the courage it took for the crew of the shuttle. But they, the Challenger Seven, were aware of the dangers, but overcame them and did their jobs brilliantly. â€"Address on the space shuttle Challenger, Ronald Reagan This part of the speech is mainly an appeal to.