Something to think about...

Ask people, "Would you take part in a mission to Mars if you had a 50% chance of dying on the mission?" A lot of people would jump at the chance.

But ask people, "Should NASA send a manned mission to Mars if it has a 50% chance of catastrophic failure (death of the astronauts)?"

I think you'll find most people would be horrified at NASA being so cavalier with the astronauts' lives.