"We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organise and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win".
— President John F. Kennedy, speech at Rice University, September 12, 1962
The main purpose of this speech was to win public support for which of the following?