In the testosterone-laden world of military aviation, call signs for pilots and other squadron personnel can be really sticky — the more an aviator complains about the moniker his colleagues bestow ...

Vladyslav Zalistovskyi, a 23-year-old MiG-29 pilot known by the call sign "Blue Helmet," died during a combat mission, the Defense Ministry's news channel Armiia TV reported on Jan. 8. This comes as ...