Here is a list of people that shouldn't be allowed in the USAF
people with mental illnesses
physically unfit people (unless they can get through training)
Why should all women be barred?
They are generally weaker, I would rather have an army of a thousand men than a thousand women. The other reason (the more important reason) is because the woman is the bearer of life and thus should not give her life for war, women are the caretakers of the children and should be treated as such, not as weapons.