Another US Air Force article highlights the tradition of Mustache March, which is rapidly coming to an end.

From the master of the T-top Trans Am, Burt Reynolds, to the bad boy of breakfast buffets, Ron Swanson, powerful males around the world share one feature that is the universal symbol of manhood: the mustache.
 
“Mustache March,” an Air Force tradition with roots going back to the Vietnam era, is a 31-day, fuzzy-lipped free-for-all in which participants boldly proclaim their awesomeness by growing mustaches.

Apparently the writer thinks fighter pilots are particularly manly.  Or, more accurately, much of the rest of the Air Force has joined in on the fighter pilot tradition.

Just remember,

With a great mustache comes great responsibility.