There are eight U.S. astronauts left out of the 12 who walked on the moon. All of us are in the eighth decade of our lives. Each of us can attest to the importance of continuing human exploration of space and the tremendous impact it has had on so many facets of our society. The technical innovations, scientific achievements, medical breakthroughs, environmental enhancements, national defense improvements and educational impacts have been immeasurable. Our nation simply cannot afford to lose a program that has contributed so much for so long. Our leaders have some important decisions to make and they need to make them now. The moon must not be the last stop in America’s quest for knowledge of other planets and of other places. –Apollo 11 astronaut Buzz Aldrin, via Time.