Douglas Bader lost both legs in a 1931 aerobatic crash at age 21, fought his way back into the RAF, and led Spitfire wings over occupied Europe during World War II.
How a pre-war floatplane racing series - saved by a private widow's check - became the crucible that produced the Spitfire and the Rolls-Royce Merlin engine.
The RAF's unarmed, pink-painted Photo Reconnaissance Unit Spitfires gathered the intelligence that shaped Allied strategy across every major WWII campaign.
The Schneider Trophy seaplane races of the 1920s and 1930s directly produced the engineering breakthroughs that made the Supermarine Spitfire - and Britain's survival in 1940 - possible.