Yes, we have lost it. Years ago we went from barely being able to put an unmanned satellite into orbit to putting men on the moon in eight years. Today, the estimate is that even if Congress was willing to fund it, it would take 12-15 years to duplicate project Apollo. This is true despite all the advances in technology.
We lack leaders with vision. Vision other than getting reelected and getting more for their the Big Boys who have bought their vote.
The worst decisions are usually made in times of anger and impatience.