Why is the U.S. space program shying away from its ambitious missions of the past?
How did the United States rise to meet the challenge posed by Sputnik?
Why should the United States invest more heavily in its “human infrastructure”?
Fifty years after Sputnik, is there any reason for the United States to redouble its commitment to space exploration?
How did a 184-pound Soviet satellite hit the United States like a ton of bricks?