Piston engines powered every significant Second World War air battle. Calum Douglas, who has written a brilliant book on the race for engineering supremacy, joins Al Murray and James Holland to explore the story of the men at the forefront of the battle.
Ep 9: Bunker Busting
Al Murray and James Holland explore the converted tanks used at Normandy. Also up for discussion are parachute decoys, the dangers of back-flash and who killed Michael Wittmann.