“Much of the plane [Mitsubishi ‘Betty’] was built of lightweight magnesium, a very inflammable metal, and in the wing roots and body between were poorly protected fuel and oil tanks. The result was a highly vulnerable aircraft so prone to burst into flames when hit that Japanese aircrews nicknamed it ‘Type 1 Lighter.’” – Henry I. Shaw, Jr., and Major Douglas T. Kane, USMC, Isolation of Rabaul, History of U.S. Marine Corps Operations in World War II, Vol. II, “Part V, Marine Air Against Rabaul”