Cook County, Ill., Sheriff Tom Dart walks the halls of his jail every day. With 10,000 inmates, this place is a small city — except a third of the people here are mentally ill.
Dart has created some of the most innovative programs in the country to handle mentally ill inmates, hiring doctors and psychologists, and training staff. But if you ask anyone here, even this jail is barely managing.
"I can't conceive of anything more ridiculously stupid by government than to do what we're doing right now," Dart says.
"I don't know why you're on Mars, but whatever the reason for going to Mars is, I'm glad you're there and I wish I was with you."
That was a part of astrophysicist Carl Sagan's message, recorded a few months before he died in 1996, to the future human inhabitants of Mars.
Some of the earliest science fiction imagined voyages to the Red Planet. We now have the space-faring technology, and getting humans to Mars actually seems within reach. It would certainly involve massive resources and a lot of danger, but some believe the rewards would be massive.