Blaze of Noon.

In this aerial melodrama, four brothers working as stunt pilots for a flying circus leave their jobs to become mail pilots. Because their job requires that they constantly travel, they are advised to not settle down with wives and kids. Still, one pilot falls in love and marries. Unfortunately, the woman dislikes his brothers and constantly worries that he will be killed during a flight. Her fears are not unfounded and much tragedy ensues as the story unfolds.