NASA Chief: Moon + Mars = Greatness

Travel to the moon, Mars and beyond will be "expensive, difficult and dangerous," concedes NASA Admininstrator Michael Griffin in an op-ed in the Houston Chronicle. So why do it? Because it's "strategic." We have to be like the Pilgrims, Griffin says, giving ourselves the challenge of learning how to live in an unfamiliar environment. If we choose to stick with our own planet, we're giving up on greatness as a nation, he argues, because, "throughout history, the great nations have been the ones at the forefront of the frontiers of their time." (Thanks to A.L. for the link.)