Mike Griffin is worried about losing a Shuttle crew if the program is extended:
“Given that our inherent risk assessment of flying any shuttle mission is about a 1-in-75 fatality risk, if you were to fly 10 more flights, you would have a very substantial risk of losing a crew. I don’t want to do that.”
If we accept his risk number, that translates into a 13% chance over ten flights. That doesn’t seem “substantial” to me. There are a lot of good reasons to not extend the program, but risk of crew loss isn’t one of them. I’m sure that most of the astronauts would be happy to take the risk, and the real loss wouldn’t be astronauts (of whom we have a large oversupply), but the loss of another orbiter, which would almost certainly end the program, because they probably couldn’t manage with only two left. If what they’re doing is important enough to risk an orbiter, that is almost literally irreplaceable, it’s surely important enough to risk crew, who are all volunteers, and fully informed of the risk.
When I was watching coverage of the cranewreck in Manhattan yesterday, they cited a statistic from the Bureau of Labor statistics that there were forty-three construction deaths last year (I think in New York alone). Can someone explain to me why is it acceptable to kill construction workers, but not astronauts?
On the other hand, here’s one thing that I do agree with Mike on: the last thing we need is another space race.