On 07 March 2012, Neil de Grasse Tyson spoke in front of the US SenateÂ Committee on Commerce, Science and Transportation. This is a video of his testimony. He gives an opening statement, followed by questions from the Committee.
This is well worth the 25:49 it takes to listen to. Dr. Tyson speaks to the kind of passion that infused the "golden age" of American space travel, and can once again animate new ventures in science, both "out there" and here on the ground.
If the embed doesn't work, the YouTube link is here.