A top-ranking member of E.A.G.L.E. A man of severe, no-nonsense demeanor, he regards superheroes in general with a certain amount of distrust.
Alongside various superheroes, Flint led an E.A.G.L.E. team in the investigation of the mysterious doorway hovering over the Gaines River in Astro City. He ordered jets to fire missiles at it in an attempt to break through, but they were intercepted by Samaritan and several other superheroes, who feared splash-back damage to the gathering witnesses. Eventually Ambassador Telseth just as mysteriously emerged from the doorway, requesting a guide to humanity. Flint insisted it be an E.A.G.L.E. man but was refused and accepted the situation based on the fact there was nothing E.A.G.L.E. could do about it. ("Through Open Doors (Part One)")