If I could go up in space tomorrow in a shuttle, I would... and I wouldn't waste a second to think about it. The last human life to die in our space program was in 1987, that is 16 years ago! Seems safe enough for me...
On a similar note, we have never lost any life outside of our own atmosphere. At least the seven astronauts who died, did so here on Earth
Lets remember those astronauts as what they were: explorers. No explorer would want their death to end the human spirit of exploration... at least I wouldn't.