Remembering America's lost space pioneers

摘要

We recently observed NASA Day of Remembrance, an opportunity for Americans everywhere to reflect on the service of the men and women of the National Aeronautics and Space Administration who helped lead our nation into the heavens and never came home. We are inspired by all those who have dedicated their time and talent to exploring the universe, discovering the mysteries of creation, and pushing the boundaries of human potential. But on that occasion, we paid special tribute to the heroic sacrifice of those who have lost their lives throughout our ascent into the stars.