High-flying heroes were all the rage in the golden age of comics... and even in modern publishing history which literally litters the skies with these crusaders caressing the clouds. Of those legions of legendary leapers, the most notable next to the Supermen and Marvel Family were Hawkman and Bulletman. Each debutted in 1940 and quickly blazed trails others would follow for the years and decades to follow.
In the golden age on Earth-Two, Carter Hall was a scientist who accessed the knowledge from ancient Egypt, including discovering the gravity-defying Nth metal. Wearing a harness equipped with enlarged wings, Hall donned the cowl and costume of Hawkman. On the parallel world of Earth-S around the same time, police scientist Jim Barr developed a chemical compound as a "crime cure" that enhanced his mental and physical atributes. Using his new intellect, Barr developed a Gravity Regulator Helmet and designed the costume of Bulletman.
While Hall stuck to his inheritance and interest in museums, Barr continued his career in criminal investigations, while each defended their native New York from threats both abroad and those more local. In the silver age, another Hawkman named Katar Hol would appear visit Earth-One from his native Thanagar wearing the anti-gravity gear developed by his father, intent on learning of local law enforcement methods to supplemental his own career as a policeman. Shortly thereafter, Bulletman would alongside his wife and partner Bulletgirl be revived into a modern age, freed from Doctor Sivana's Suspendium. The original Hawkman would likewise be protected from the ravages of time due to a villain's machinations. Eventually, Katar and Jim would team up to save Barr's homeworld from King Kull.