"Spooked by those numbers back in 2007, when a trillion dollars still seemed like a ridiculous amount of money for even the U.S. government to spend, Congress stipulated in a NASA appropriations bill that ”none of the funds…shall be used for any research, development, or demonstration activities related exclusively to the human exploration of Mars."

Mars Is Hard

Crazy to me that the government forbids NASA from spending money on manned Mars missions. So much for American dreams.