This top 10 countdown special reveals the weapons, inventions, and vehicles that shaped and decided World War II: German 88 mm gun, Studebaker US6 2½-ton truck, Mitsubishi A6M Zero, Essex-class aircraft carrier, Boeing B-17 Flying Fortress, Grumman F6F Hellcat, Unterseeboot (U-boat), North American P-51 Mustang, Cavity Magnetron No. 12, and Atomic Bomb. With a countdown format and an outstanding cast of experts, we'll provide an explosive and definitive understanding of the greatest conflict of all time seen through the incredible hardware that tipped the balance and changed the world.