You couldn't "see it", so I showed it to you. "Mission" is no more "gender-neutral" than "airmen". You've got men, women and airmen, the latter being both of the former. That anybody is concerned "women" are offended by "airmen" is a matter of their maturity. The snickering delinquents in the back row of a junior high school health class comes to my mind. Their shallowness leads to the specimens in the earlier photo being appointed to critical roles in our government. IMO.