NASA administrator Michael Griffin in 2009
It is the law of the land to put a man on the moon before 2020.
In 2009 the NASA chief Micheal Griffin told: All though you will get amazed the number of times I get questions from top level policymakers. Concerning, why don't we pull some of that Apollo equipment out of the barn, and head back? The NASA Administrator would answer them with. "There is no barn, we will spend the next ten year to recreating a lot of capability for space flight, hopefully go a little bit beyond, but we will spend the next ten years recreating capabilities this nation had and threw away, proactively and with mallows of forethought. (Video part 1 at 4:38). A little bit later Griffin tells that NASA should land a man on the moon not later than 2020 as it was the law of the land (Video part 1 at 6:30). The monologue and Q&A is a little jewel for those who have the ears to listen.
Video credit to NASA and Google.