And so, my fellow Americans: ask not what your country can do for you—ask what you can do for your country. And so begins your invigorating, innovative learning experience in the JFK Challenge app! Learners...

Seven percent of Americans believe the moon landing was staged. The presentation covers manned space exploration from the beginning of the space race through the Gemini missions. The lesson is the 23rd in a set of 26.

This photo of the moon shows the landing sites for Apollo 11, 12, 14, 15, 16, and 17.