A dramatic pencil drawing of a bald eagle in mid-flight with wings fully extended, captured with dynamic energy on white background using graphite. Render the eagle with anatomical precision showing every primary and secondary flight feather with individual barb detail, the characteristic white head and tail feathers contrasting with dark body plumage. The bird's fierce expression should be captured with penetrating yellow eyes, sharp hooked beak with proper texture, and powerful talons extended as if about to strike. Each feather should show proper overlap, natural wear patterns, and the way light defines their three-dimensional form through sophisticated shading. Include incredible detail in the head feathers' texture and the scaly texture of the legs. Position the eagle against a suggested mountain landscape background rendered with atmospheric perspective - distant peaks, pine trees, and perhaps an alpine lake, all executed in softer values to maintain focus on the bird. Use dynamic composition to convey motion and power. This majestic piece should capture America's national symbol in its full glory with technical excellence and dramatic impact worthy of prominent display.