By the way, as I cited a couple times before, NASA did a study that found, on average, men *do* have better visuo-spatial skills and also better reaction time -and so they have a tendency to make better pilots. Women, on the other hand, they found to have, on average, better skills at considering multiple factors, weighing alternatives, and better judgment of risk (much the same as what Ms. Allen cited!), and so concluded that they tend to make better commanders...

Here's an article about a couple of them now, and how NASA addresses the issue

Castigat Ridendo Mores
(laughter succeeds where lecturing fails)

"Those who will risk nothing, risk everything"