The Challenger tragedy changed not only NASA, but the entire space agency when it comes to safety. The cause of the accident was found to be defective O-rings. Do you remember where you were when it happened?
So many little kids answer astronaut when they're asked what they want to be when they grow up. Space exploration is something that many people are still in awe over. It's always amazing to me when I realize we've been to the moon, and think of all of the discoveries we've made. Yet there are always costs and risks that go along with the exploration. A strong crew was lost in the Challenger